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Srivastava S, Garg I. Thrombotic complications post liver transplantation: Etiology and management. World J Crit Care Med 2024; 13:96074. [PMID: 39655303 PMCID: PMC11577539 DOI: 10.5492/wjccm.v13.i4.96074] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/26/2024] [Revised: 10/01/2024] [Accepted: 10/24/2024] [Indexed: 10/31/2024] Open
Abstract
Liver transplantation (LT) is the life saving therapeutic option for patients with acute and chronic end stage liver disease. This is a routine procedure with excellent outcomes in terms of patient survival and quality of life post LT. Orthotopic LT (OLT) patients require a critical care as they are prone to variety of post-operative vascular, cardiovascular, biliary, pulmonary and abdominal complications. Thrombotic complications (both arterial and venous) are not uncommon post liver transplant surgery. Such vascular problems lead to increased morbidity and mortality in both donor and graft recipient. Although thromboprophylaxis is recommended in general surgery patients, no such standards exist for liver transplant patients. Drastic advancements of surgical and anesthetic procedures have improvised survival rates of patients post OLT. Despite these, haemostatic imbalance leading to thrombotic events post OLT cause significant graft loss and morbidity and even lead to patient's death. Thus it is extremely important to understand pathophysiology of thrombosis in LT patients and shorten the timing of its diagnosis to avoid morbidity and mortality in both donor and graft recipient. Present review summarizes the current knowledge of vascular complications associated with LT to highlight their impact on short and long-term morbidity and mortality post LT. Also, present report discusses the lacunae existing in the literature regarding the risk factors leading to arterial and venous thrombosis in LT patients.
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Affiliation(s)
- Swati Srivastava
- Defence Institute of Physiology and Allied Sciences, Defence Research and Development organization, Delhi 110054, India
| | - Iti Garg
- Defence Institute of Physiology and Allied Sciences, Defence Research and Development organization, Delhi 110054, India
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2
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AIUM Practice Parameter for the Performance of an Ultrasound Examination of Solid Organ Transplants, 2024 Revision. JOURNAL OF ULTRASOUND IN MEDICINE : OFFICIAL JOURNAL OF THE AMERICAN INSTITUTE OF ULTRASOUND IN MEDICINE 2024; 43:E65-E74. [PMID: 39212381 DOI: 10.1002/jum.16563] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/14/2024] [Accepted: 08/16/2024] [Indexed: 09/04/2024]
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3
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Husnain A, Aadam A, Borhani A, Riaz A. Atlas for Cholangioscopy and Cholecystoscopy: A Primer for Diagnostic and Therapeutic Endoscopy in the Biliary Tree and Gallbladder. Semin Intervent Radiol 2024; 41:278-292. [PMID: 39165656 PMCID: PMC11333118 DOI: 10.1055/s-0044-1788340] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/22/2024]
Abstract
Percutaneous endoscopy of the biliary system (cholangioscopy) and gallbladder (cholecystoscopy) has significantly impacted diagnostic and therapeutic approaches to many diseases in interventional radiology, overcoming previous challenges related to scope size and rigidity. The current endoscopes offer enhanced maneuverability within narrow tubular structures such as bile ducts. Before endoscopy, reliance on 2D imaging modalities limited real-time visualization during percutaneous procedures. Percutaneous endoscopy provides 3D perspectives, enabling a better appreciation of normal structures, targeted biopsy of lesions, and accurate deployment of therapeutic interventions. This review aims to explore percutaneous endoscopic findings across various biliary and gallbladder pathologies.
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Affiliation(s)
- Ali Husnain
- Department of Radiology, Section of Interventional Radiology, Northwestern Memorial Hospital, Chicago, Illinois
| | - Aziz Aadam
- Department of Medicine, Section of Gastroenterology, Northwestern Memorial Hospital, Chicago, Illinois
| | - Amir Borhani
- Department of Radiology, Section of Abdominal Imaging, Northwestern Memorial Hospital, Chicago, Illinois
| | - Ahsun Riaz
- Department of Radiology, Section of Interventional Radiology, Northwestern Memorial Hospital, Chicago, Illinois
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4
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Kadaba P, Beitia L, Rosen A, Weinberg A, Lewis S, Simpson WL. Utility of nifedipine use for Doppler ultrasound early after liver transplantation to predict short-term complications and long-term outcomes. Abdom Radiol (NY) 2024; 49:1103-1112. [PMID: 38219253 DOI: 10.1007/s00261-023-04152-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2023] [Revised: 12/01/2023] [Accepted: 12/05/2023] [Indexed: 01/16/2024]
Abstract
PURPOSE To evaluate the response to nifedipine administration measured by changes in hepatic arterial (HA) flow on post-operative Doppler ultrasound (US) to predict short-term complications and long-term outcomes in liver transplant (LT) patients. METHODS Patients who underwent LT with post-operative Doppler US within 3 days between 1 January 2005 and 31 December 2015 were included in this retrospective single center study. The patients who received and did not receive nifedipine during the Doppler US comprised the study and control groups, respectively. A positive response to nifedipine was defined as the detection of HA flow when none was present initially or a reduction in HA resistive index (RI) ≥ 0.1 after nifedipine administration. The rates of re-transplantation, re-operation, percutaneous intervention (PCI), and overall survival (OS) were recorded. Cox proportional hazards regression was used to evaluate the association of clinic-demographic variables and Doppler findings with the outcome measures. RESULTS 444 LT patients (305 M/139F, mean age 51.7 ± 17.4 years, mean interval between LT-Doppler US 1.12 ± 0.9 days) are presented. 220 patients comprised the nifedipine study group [n = 157/220 (71.4%) responder, n = 63/220 (28.6%) nonresponder] and 224 patients comprised the control group. There was no difference in re-transplantation or PCI rates between the groups (all p-values ≥ 0.2 and ≥ 0.08, respectively). The responder group had a lower rate of re-operation vs. the control group (15.9% vs. 24.1%, p = 0.03) and nonresponder group (15.9% vs. 31.8%, p = 0.004). 1-year and 2-year OS were similar between the groups (all p-values > 0.37). CONCLUSION Short-term complication rates and long-term outcomes for patients with liver transplant who responded to nifedipine administration on Doppler US are similar to those who did not require nifedipine administration. A lack of response to nifedipine was associated with a higher re-operation rate.
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Affiliation(s)
- Priyanka Kadaba
- Department of Diagnostic, Molecular and Interventional Radiology, Icahn School of Medicine at Mount Sinai, Gustave L Levy Place, Box 1234, New York, NY, 10029, USA
| | - Laura Beitia
- Department of Diagnostic, Molecular and Interventional Radiology, Icahn School of Medicine at Mount Sinai, Gustave L Levy Place, Box 1234, New York, NY, 10029, USA
| | - Ally Rosen
- Department of Diagnostic, Molecular and Interventional Radiology, Icahn School of Medicine at Mount Sinai, Gustave L Levy Place, Box 1234, New York, NY, 10029, USA
- Department of Radiology, Memorial Sloan Kettering Cancer Center, New York, NY, 10065, USA
| | - Alan Weinberg
- Department of Population Health Science and Policy, Icahn School of Medicine at Mount Sinai, New York, NY, 10029, USA
| | - Sara Lewis
- Department of Diagnostic, Molecular and Interventional Radiology, Icahn School of Medicine at Mount Sinai, Gustave L Levy Place, Box 1234, New York, NY, 10029, USA
- BioMedical Engineering and Imaging Institute, Icahn School of Medicine at Mount Sinai, New York, NY, 10029, USA
| | - William L Simpson
- Department of Diagnostic, Molecular and Interventional Radiology, Icahn School of Medicine at Mount Sinai, Gustave L Levy Place, Box 1234, New York, NY, 10029, USA.
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Verhagen MV, de Kleine RH, Groen H, van der Doef HPJ, Kwee TC, de Haas RJ. Doppler-ultrasound reference values after pediatric liver transplantation: a consecutive cohort study. Eur Radiol 2023; 33:6404-6413. [PMID: 36930263 PMCID: PMC10415481 DOI: 10.1007/s00330-023-09522-2] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2022] [Revised: 11/22/2022] [Accepted: 02/03/2023] [Indexed: 03/18/2023]
Abstract
OBJECTIVES Doppler ultrasound (DUS) is the main imaging modality to evaluate vascular complications of pediatric liver transplants (LT). The current study aimed to determine reference values and their change over time. METHODS A consecutive cohort of pediatric patients undergoing an LT were retrospectively included between 2015 and 2020. Timepoints for standardized DUS were intra-operative and postoperative (day 0), days 1-7, months 1 and 3, and years 1 and 2. DUS measurements of the hepatic artery (HA), portal vein (PV), and hepatic vein(s) (HV) were included if there were no complications during 2 years follow-up. Measurements consisted of: peak systolic velocity (PSV) and resistive index (RI) for the HA, PSV for the PV, and venous pulsatility index (VPI) for the HV. Generalized estimating equations were used to analyze change over time. RESULTS One hundred twelve pediatric patients with 123 LTs were included (median age 3.3 years, interquartile range 0.7-10.1). Ninety-five HAs, 100 PVs, and 115 HVs without complications were included. Reference values for HA PSV and RI, PV PSV, and HV VPI were obtained for all timepoints (4043 included data points in total) and presented using 5th-95th percentiles and threshold values. All reference values changed significantly over time (p = 0.032 to p < 0.001). CONCLUSIONS DUS reference values of hepatic vessels in children after LT are presented, reference values change over time with specific vessel-dependent patterns. Timepoint-specific reference values improve the interpretation of DUS values and may help to better weigh their clinical significance. KEY POINTS • Doppler ultrasound reference values of pediatric liver transplantations are not static but change over time. Applying the correct reference values for the specific timepoint may further improve the interpretation of the measurements. • The pattern of change over time of Doppler ultrasound measurements differs between the hepatic vessel and measurement; knowledge of these patterns may help radiologists to better understand normal postoperative hemodynamic changes.
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Affiliation(s)
- Martijn V Verhagen
- Department of Radiology, University of Groningen, University Medical Center Groningen, PO Box 30 001, 9700 RB, Groningen, The Netherlands.
| | - Ruben H de Kleine
- Department of Hepatobiliary Surgery and Liver Transplantation, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
| | - Henk Groen
- Department of Epidemiology, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
| | - Hubert P J van der Doef
- Department of Pediatric Gastroenterology, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
| | - Thomas C Kwee
- Department of Radiology, University of Groningen, University Medical Center Groningen, PO Box 30 001, 9700 RB, Groningen, The Netherlands
| | - Robbert J de Haas
- Department of Radiology, University of Groningen, University Medical Center Groningen, PO Box 30 001, 9700 RB, Groningen, The Netherlands
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Lerut AV, Pirenne J, Sainz-Barriga M, Blondeel J, Maleux G, Monbaliu D. Case report: Immediate revascularization for symptomatic hepatic artery pseudoaneurysm after orthotopic liver transplantation? A case series and literature review. Front Surg 2023; 10:1169556. [PMID: 37440926 PMCID: PMC10333477 DOI: 10.3389/fsurg.2023.1169556] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2023] [Accepted: 06/06/2023] [Indexed: 07/15/2023] Open
Abstract
Introduction Hepatic artery pseudoaneurysm (HAPA), a rare vascular complication that can develop after liver transplantation, is associated with a high mortality rate and graft loss. To salvage the liver graft, immediate revascularization, either through surgical or endovascular intervention, is required. However, currently there is no consensus on the optimal strategy. Here, we report three cases of liver transplant recipients diagnosed with HAPA and treated with immediate revascularization. In addition, we present an overview of HAPA cases described in the literature and make recommendations on how to treat this rare complication. Methods All adults transplanted in our center between 2005 and 2021 were retrospectively reviewed. Literature search was done in PubMed for original studies between 1980 and 2021 reporting early hepatic artery (pseudo) aneurysm after liver transplantation requiring either surgical or endovascular intervention. Results From a total of 1,172, 3 liver transplant patients were identified with a symptomatic HAPA and treated with immediate revascularization. HAPA occurred 73, 27, and 8 days after liver transplantation and was treated with immediate revascularization (two surgical and one endovascular intervention). Literature review identified 127 cases of HAPA. HAPA was managed with endovascular therapy in 20 cases and by surgical intervention in 89 cases. Overall reported mortality rate was 39.6%, whereas overall graft survival was 45.2%. Conclusion Immediate surgical or radiological interventional excision and prompt revascularization to salvage liver grafts is feasible but still associated with a high mortality.
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Affiliation(s)
- An Verena Lerut
- Department of Abdominal Transplant Surgery, University Hospitals Leuven, Leuven, Belgium
| | - Jacques Pirenne
- Department of Abdominal Transplant Surgery, University Hospitals Leuven, Leuven, Belgium
- Laboratory of Abdominal Transplantation, Department of Microbiology, Immunology and Transplantation, KU Leuven, Leuven, Belgium
| | - Mauricio Sainz-Barriga
- Department of Abdominal Transplant Surgery, University Hospitals Leuven, Leuven, Belgium
| | - Joris Blondeel
- Department of Abdominal Transplant Surgery, University Hospitals Leuven, Leuven, Belgium
- Laboratory of Abdominal Transplantation, Department of Microbiology, Immunology and Transplantation, KU Leuven, Leuven, Belgium
| | - Geert Maleux
- Department of Radiology, University Hospitals Leuven, Leuven, Belgium
| | - Diethard Monbaliu
- Department of Abdominal Transplant Surgery, University Hospitals Leuven, Leuven, Belgium
- Laboratory of Abdominal Transplantation, Department of Microbiology, Immunology and Transplantation, KU Leuven, Leuven, Belgium
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7
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Choi Y, Kim JH, Jeon UB, Jang JY, Kim TU, Ryu H. Inferior Vena Cava Stenosis Following Orthotopic Liver Transplantation: Differentiating Points from False Positives. JOURNAL OF THE KOREAN SOCIETY OF RADIOLOGY 2023; 84:713-718. [PMID: 37324995 PMCID: PMC10265236 DOI: 10.3348/jksr.2021.0137] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/04/2021] [Revised: 11/07/2021] [Accepted: 11/16/2021] [Indexed: 06/17/2023]
Abstract
Orthotopic liver transplantation has become the treatment of choice for patients with end-stage liver disease. Various early or delayed vascular complications, including arterial pseudoaneurysm, thrombosis, or stenosis, and venous stenosis or occlusion, may lead to graft failure. Early detection and prompt management of such complications are essential to achieve successful transplantation and prevent the need for retransplantation. This report presents differentiating points, using computed tomography and digital subtraction angiography findings and measurement of pressure gradient across the stenotic lesion, that require immediate intervention in patients with inferior vena cava stenosis after orthotopic liver transplantation.
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8
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Verhagen MV, de Kleine RH, van der Doef HP, Kwee TC, de Haas RJ. Doppler Ultrasound of Vascular Complications After Pediatric Liver
Transplantation: Incidence, Time of Detection, and Positive Predictive
Value. Ultrasound Int Open 2022; 8:E36-E42. [PMID: 36408371 PMCID: PMC9668490 DOI: 10.1055/a-1961-9100] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2022] [Accepted: 10/13/2022] [Indexed: 11/18/2022] Open
Abstract
Purpose
Doppler ultrasound (DUS) is widely used to detect vascular
complications after pediatric liver transplantation (LT). This study aimed to
assess the moment of first detection of vascular complications with DUS, and to
determine the positive predictive value (PPV) of DUS.
Materials and Methods
Patients aged 0–18 years who underwent LT
between 2015 and 2019 were retrospectively included. 92 LTs in 83 patients were
included (median age: 3.9 years, interquartile range: 0.7–10.5).
Patients underwent perioperative (intra-operative and immediately postoperative)
and daily DUS surveillance during the first postoperative week, and at 1, 3, and
12 months. Vascular complications were categorized for the hepatic artery,
portal vein, and hepatic veins. DUS findings were compared to surgical or
radiological findings during the 1-year follow-up.
Results
52 vascular complications were diagnosed by DUS in 35/92
LTs (38%). 15 out of 52 (28.8%) were diagnosed perioperatively,
29/52 (55.8%) were diagnosed on postoperative days 1–7,
and 8/52 (15.4%) after day 7. The PPV for all vascular
complications diagnosed with DUS was 92.3%. During the 1-year follow-up,
18/19 (94.7%) hepatic artery complications, 19/26
(73.1%) portal vein complications, and 7/7 (100%)
hepatic vein complications were diagnosed perioperatively or during the first
week.
Conclusion
The majority of vascular complications during the first year
after pediatric LT were diagnosed by DUS perioperatively or during the first
week, with a high PPV. Our findings provide important information regarding when
to expect different types of vascular complications on DUS, which might improve
DUS post-LT surveillance protocols.
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Affiliation(s)
- Martijn V. Verhagen
- Department of Radiology, UMCG, Groningen, Netherlands,Correspondence Dr. Martijn V. Verhagen UMCGDepartment of RadiologyHanzeplein 19700RB GroningenNetherlands31(0)625649708
| | - Ruben H.J. de Kleine
- Department of Surgery, Division of Hepato-Pancreato-Biliary Surgery and
Liver Transplantation, University of Groningen, University Medical Centre
Groningen, Groningen, Netherlands
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9
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Okeke RI, Bettag J, Wells R, Wycoff M, Hallcox T, Lok J, Phocas A, Annakie DL, Shoela R, Nazzal M. Intraoperative Doppler Ultrasound for Detection of Early Postoperative Vascular Complications in Orthotopic Liver Transplants. Cureus 2022; 14:e26077. [PMID: 35865449 PMCID: PMC9293270 DOI: 10.7759/cureus.26077] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/19/2022] [Indexed: 01/10/2023] Open
Abstract
Liver transplantation is currently the only curative treatment for patients with end-stage liver disease. However, liver transplantation can be associated with catastrophic complications in the early postoperative setting, including hepatic artery thrombosis (HAT) and portal vein thrombosis (PVT). Postoperative complications are associated with hepatic artery resistive index (RI) < 6, systolic acceleration time (SAT) > 0.08 seconds and peak systolic velocity (PSV) > 200 cm/s on doppler ultrasound (DUS). DUS is also used in an intraoperative setting to assess patency and early complications prior to the end of the operative period, allowing for early correction. This literature review evaluates the prevalence of DUS use in intraoperative settings to identify transplant complications. A lack of consistency and minimal knowledge of intraoperative DUS warrants additional research into its usage and standardization.
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Brookmeyer CE, Bhatt S, Fishman EK, Sheth S. Multimodality Imaging after Liver Transplant: Top 10 Important Complications. Radiographics 2022; 42:702-721. [PMID: 35245104 DOI: 10.1148/rg.210108] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Patients who have undergone liver transplant are now regularly seen in day-to-day radiology practice. All surgical techniques for liver transplant require arterial, portal venous, hepatic venous and caval, and biliary anastomoses. This review is focused on the 10 "not to be missed" complications of liver transplant that affect the health and life of the graft and graft recipient. Arterial complications are the most common and devastating. Early hepatic artery thrombosis may be catastrophic because the biliary tree is solely dependent on the hepatic artery after transplant and collateral vessels have not yet formed. In contrast, delayed hepatic artery thrombosis may be more insidious as collateral arteries develop. US findings of delayed hepatic artery thrombosis may be similar to those of hepatic artery stenosis and celiac artery stenosis. Splenic artery steal syndrome is an increasingly recognized cause of graft ischemia. Venous complications are much less common. Hepatic venous and caval complications are notable for their increased incidence in living-donor and pediatric transplants. Biliary complications often result from arterial ischemia. Biliary cast syndrome is a notable example in which ischemic biliary mucosa sloughs into and obstructs the duct lumens. Neoplasms also may occur within the hepatic graft and may be due to recurrent malignancy, posttransplant lymphoproliferative disorder, or metastases. US is the initial imaging modality of choice, particularly in the acute postoperative setting. Further evaluation with contrast-enhanced US, CT, or MRI; catheter angiography; endoscopic retrograde cholangiopancreatography; and/or nuclear medicine studies is performed as needed. An invited commentary by Bhargava is available online. Online supplemental material is available for this article. ©RSNA, 2022.
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Affiliation(s)
- Claire E Brookmeyer
- From the Department of Radiology, Johns Hopkins School of Medicine, 601 N Caroline St, Baltimore, MD 21287 (C.E.B., E.K.F.); Department of Radiology, Mayo Clinic, Jacksonville, Fla (S.B.); and Department of Radiology, New York University Langone Health, New York, NY (S.S.)
| | - Shweta Bhatt
- From the Department of Radiology, Johns Hopkins School of Medicine, 601 N Caroline St, Baltimore, MD 21287 (C.E.B., E.K.F.); Department of Radiology, Mayo Clinic, Jacksonville, Fla (S.B.); and Department of Radiology, New York University Langone Health, New York, NY (S.S.)
| | - Elliot K Fishman
- From the Department of Radiology, Johns Hopkins School of Medicine, 601 N Caroline St, Baltimore, MD 21287 (C.E.B., E.K.F.); Department of Radiology, Mayo Clinic, Jacksonville, Fla (S.B.); and Department of Radiology, New York University Langone Health, New York, NY (S.S.)
| | - Sheila Sheth
- From the Department of Radiology, Johns Hopkins School of Medicine, 601 N Caroline St, Baltimore, MD 21287 (C.E.B., E.K.F.); Department of Radiology, Mayo Clinic, Jacksonville, Fla (S.B.); and Department of Radiology, New York University Langone Health, New York, NY (S.S.)
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Metra BM, Guglielmo FF, Halegoua-DeMarzio DL, Civan JM, Mitchell DG. Beyond the Liver Function Tests: A Radiologist's Guide to the Liver Blood Tests. Radiographics 2021; 42:125-142. [PMID: 34797734 DOI: 10.1148/rg.210137] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Liver blood tests (often also known as liver chemistries, liver tests, or the common misnomer liver function tests) are routinely used in diagnosis and management of hepatobiliary disease. Abnormal liver blood test results are often the first indicator of hepatobiliary disease and a common indication for abdominal imaging with US, CT, or MRI. Most of the disease entities can be categorized into hepatocellular or cholestatic patterns, with characteristic traits on liver blood tests. Each pattern has a specific differential, which can help narrow the differential diagnosis when combined with the clinical history and imaging findings. This article reviews the major liver blood tests as well as a general approach to recognizing common patterns of hepatobiliary disease within these tests (hepatocellular, cholestatic, acute liver failure, isolated hyperbilirubinemia). Examples of hepatobiliary disease with hepatocellular or cholestatic patterns are presented with characteristic test abnormalities and imaging findings. The commonly encountered scenario of chronic hepatitis with possible fibrosis is also reviewed, with discussion of potential further imaging such as elastography. The role of liver blood tests and imaging in evaluating complications of hepatic transplant is also discussed. Overall, integrating liver blood test patterns with imaging findings can help the radiologist accurately diagnose hepatobiliary disease, especially in cases where imaging findings may not allow differentiation between different entities. ©RSNA, 2021.
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Affiliation(s)
- Brandon M Metra
- From the Departments of Radiology (B.M.M., F.F.G., D.G.M.) and Internal Medicine (D.L.H.D., J.M.C.), Division of Gastroenterology and Hepatology, Thomas Jefferson University, 132 S 10th St, Main Bldg, Philadelphia, PA 19107
| | - Flavius F Guglielmo
- From the Departments of Radiology (B.M.M., F.F.G., D.G.M.) and Internal Medicine (D.L.H.D., J.M.C.), Division of Gastroenterology and Hepatology, Thomas Jefferson University, 132 S 10th St, Main Bldg, Philadelphia, PA 19107
| | - Dina L Halegoua-DeMarzio
- From the Departments of Radiology (B.M.M., F.F.G., D.G.M.) and Internal Medicine (D.L.H.D., J.M.C.), Division of Gastroenterology and Hepatology, Thomas Jefferson University, 132 S 10th St, Main Bldg, Philadelphia, PA 19107
| | - Jesse M Civan
- From the Departments of Radiology (B.M.M., F.F.G., D.G.M.) and Internal Medicine (D.L.H.D., J.M.C.), Division of Gastroenterology and Hepatology, Thomas Jefferson University, 132 S 10th St, Main Bldg, Philadelphia, PA 19107
| | - Donald G Mitchell
- From the Departments of Radiology (B.M.M., F.F.G., D.G.M.) and Internal Medicine (D.L.H.D., J.M.C.), Division of Gastroenterology and Hepatology, Thomas Jefferson University, 132 S 10th St, Main Bldg, Philadelphia, PA 19107
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12
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Contrast-enhanced ultrasound of transplant organs - liver and kidney - in children. Pediatr Radiol 2021; 51:2284-2302. [PMID: 33978794 PMCID: PMC8865443 DOI: 10.1007/s00247-020-04867-y] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/03/2020] [Revised: 08/13/2020] [Accepted: 09/30/2020] [Indexed: 10/21/2022]
Abstract
Ultrasound (US) is the first-line imaging tool for evaluating liver and kidney transplants during and after the surgical procedures. In most patients after organ transplantation, gray-scale US coupled with color/power and spectral Doppler techniques is used to evaluate the transplant organs, assess the patency of vascular structures, and identify potential complications. In technically difficult or inconclusive cases, however, contrast-enhanced ultrasound (CEUS) can provide prompt and accurate diagnostic information that is essential for management decisions. CEUS is indicated to evaluate for vascular complications including vascular stenosis or thrombosis, active bleeding, pseudoaneurysms and arteriovenous fistulas. Parenchymal indications for CEUS include evaluation for perfusion defects and focal inflammatory and non-inflammatory lesions. When transplant rejection is suspected, CEUS can assist with prompt intervention by excluding potential underlying causes for organ dysfunction. Intracavitary CEUS applications can evaluate the biliary tract of a liver transplant (e.g., for biliary strictures, bile leak or intraductal stones) or the urinary tract of a renal transplant (e.g., for urinary obstruction, urine leak or vesicoureteral reflux) as well as the position and patency of hepatic, biliary and renal drains and catheters. The aim of this review is to present current experience regarding the use of CEUS to evaluate liver and renal transplants, focusing on the examination technique and interpretation of the main imaging findings, predominantly those related to vascular complications.
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13
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Catania R, Dasyam AK, Miller FH, Borhani AA. Noninvasive Imaging Prior to Biliary Interventions. Semin Intervent Radiol 2021; 38:263-272. [PMID: 34393336 DOI: 10.1055/s-0041-1731268] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
Noninvasive imaging is a crucial and initial step in the diagnostic algorithm of patients with suspected biliary pathology and directs the subsequent diagnostic and therapeutic workup, including the endoluminal and percutaneous biliary interventions. This article reviews the current noninvasive imaging methods for the evaluation of biliary system and further discusses their roles in the diagnostic workup of different biliary disease.
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Affiliation(s)
- Roberta Catania
- Department of Radiology, Northwestern University Feinberg School of Medicine, Chicago, Illinois
| | - Anil K Dasyam
- Department of Radiology, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania
| | - Frank H Miller
- Department of Radiology, Northwestern University Feinberg School of Medicine, Chicago, Illinois
| | - Amir A Borhani
- Department of Radiology, Northwestern University Feinberg School of Medicine, Chicago, Illinois.,Department of Radiology, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania
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Cannella R, Dasyam A, Miller FH, Borhani AA. Magnetic Resonance Imaging of Liver Transplant. Magn Reson Imaging Clin N Am 2021; 29:437-450. [PMID: 34243928 DOI: 10.1016/j.mric.2021.05.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
MR imaging increasingly has been adopted for follow-up imaging post-liver transplantation and for diagnosis of its complications. These include vascular and biliary complications as well as post-transplant malignancies. Interpretation of postoperative MR imaging should take into account the surgical technique and expected post-transplant changes. Contrast-enhanced MR imaging has high sensitivity for identification of vascular complications. MR cholangiopancreatography on the other hand is the most accurate noninvasive method for evaluation of biliary complications.
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Affiliation(s)
- Roberto Cannella
- Section of Radiology - Department of Biomedicine, Neuroscience and Advanced Diagnostics (BiND), University Hospital "Paolo Giaccone", Via del Vespro 129, Palermo 90127, Italy; Department of Health Promotion, Mother and Child Care, Internal Medicine and Medical Specialties (PROMISE), University of Palermo, Via del Vespro, 129, Palermo 90127, Italy
| | - Anil Dasyam
- Department of Radiology, Abdominal Imaging Division, University of Pittsburgh School of Medicine, 200 Lothrop Street, UPMC Presbyterian Suite 200, Pittsburgh, PA 15213, USA
| | - Frank H Miller
- Department of Radiology, Body Imaging Section, Northwestern University Feinberg School of Medicine, 676 N Saint Clair Street, Chicago, IL 60611, USA
| | - Amir A Borhani
- Department of Radiology, Abdominal Imaging Division, University of Pittsburgh School of Medicine, 200 Lothrop Street, UPMC Presbyterian Suite 200, Pittsburgh, PA 15213, USA; Department of Radiology, Body Imaging Section, Northwestern University Feinberg School of Medicine, 676 N Saint Clair Street, Chicago, IL 60611, USA.
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Arterioportal Fistulas (APFs) in Pediatric Patients: Single Center Experience with Interventional Radiological versus Conservative Management and Clinical Outcomes. J Clin Med 2021; 10:jcm10122612. [PMID: 34198478 PMCID: PMC8231897 DOI: 10.3390/jcm10122612] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2021] [Revised: 06/10/2021] [Accepted: 06/11/2021] [Indexed: 02/07/2023] Open
Abstract
Arterioportal fistulas (APFs) are uncommon vascular abnormalities with a heterogeneous etiology. In pediatric orthotopic liver transplantation (OLT), APFs are frequently iatrogenic, following percutaneous liver interventions. The aim of this study was to report the 10-year experience of a tertiary referral center for pediatric OLT in the interventional radiological (IR) and conservative management of acquired APFs. A retrospective search was performed to retrieve pediatric patients (<18 years old) with a diagnosis of APF at color Doppler ultrasound (CDUS) or computed tomography angiography (CTA) from 2010 to 2020. Criteria for IR treatment were the presence of hemodynamic alterations at CDUS (resistive index <0.5; portal flow reversal) or clinical manifestations (bleeding; portal hypertension). Conservatively managed patients served as a control population. Clinical and imaging follow-up was analyzed. Twenty-three pediatric patients (median age, 4 years; interquartile range = 11 years; 15 males) with 24 APFs were retrieved. Twenty patients were OLT recipients with acquired APFs (16 iatrogenic). Twelve out of twenty-three patients were managed conservatively. The remaining 11 underwent angiography with confirmation of a shunt in 10, who underwent a total of 16 embolization procedures (14 endovascular; 2 transhepatic). Technical success was reached in 12/16 (75%) procedures. Clinical success was achieved in 8/11 (73%) patients; three clinical failures resulted in one death and two OLTs. After a median follow-up time of 42 months (range 1–107), successfully treated patients showed an improvement in hemodynamic parameters at CDUS. Conservatively managed patients showed a stable persistence of the shunts in six cases, spontaneous resolution in four, reduction in one and mild shunt increase in one. In pediatric patients undergoing liver interventions, APFs should be investigated. Although asymptomatic in most cases, IR treatment of APFs should be considered whenever hemodynamic changes are found at CDUS.
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Yen LH, Sabatino JC. Imaging complications of liver transplantation: a multimodality pictorial review. Abdom Radiol (NY) 2021; 46:2444-2457. [PMID: 31679057 DOI: 10.1007/s00261-019-02270-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
Liver transplantation is one of the most commonly performed surgical procedures for the treatment of end-stage liver disease and hepatocellular carcinoma. Post-transplantation complications include vascular, nonvascular, and biliary. Common imaging techniques used to evaluate the hepatic graft are ultrasonography (US), CT, MR imaging, cholangiography, angiography, and scintigraphy. The purposes of this pictorial review are to review imaging findings of complications of liver transplantation and provide a framework for early detection of post-surgical complications.
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Mohamed Afif A, Anthony APM, Jamaruddin S, Su'aidi SU, Li HH, Low ASC, Cheong EHT. Diagnostic accuracy of Doppler ultrasound for detecting hepatic artery stenosis after liver transplantation. Clin Radiol 2021; 76:708.e19-708.e25. [PMID: 33902885 DOI: 10.1016/j.crad.2021.02.032] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2020] [Accepted: 02/17/2021] [Indexed: 12/25/2022]
Abstract
AIM To evaluate the diagnostic accuracy of Doppler ultrasound (DUS) in detecting hepatic artery stenosis (HAS) after liver transplantation using computed tomography angiography (CTA) as the reference standard. MATERIALS AND METHODS This study included data from January 2005 to November 2017, where DUS of the hepatic artery of living and deceased donor liver grafts were compared with the reference standard, CTA. DUS parameters, such as intrahepatic artery (IHA) peak systolic velocity (PSV), resistive index (RI), systolic acceleration time (SAT); and extrahepatic artery (EHA) PSV were taken. The optimum cut-off was estimated using area under the receiver operating characteristic curve (AUC). Multivariable logistic regression analysis was developed to predict HAS. RESULTS Ninety-nine liver transplant cases were retrieved, 50 met the inclusion criteria where nine patients had significant HAS. HAS patients had a significantly low IHAPSV with a cut-off of 35.1 cm/s (sensitivity 53.8%, specificity 78.4%, AUC 0.701). IHARI had a significantly low RI with a cut-off 0.585 (sensitivity 86.7%, specificity 85.4%, AUC 0.913). The IHASAT cut-off was 0.045 seconds (sensitivity 80%, specificity 91.4%, AUC 0.857). The EHAPSV cut-off was 197.4 cm/s (sensitivity 50%, specificity 99.1%, AUC 0.648). The prediction model using DUS parameters IHARI and IHASAT demonstrated good discrimination with an AUC of 0.930 (95% CI: 0.843, 1.000; sensitivity 93.3%, specificity 88%). CONCLUSION A prediction model using the DUS parameters IHARI and IHASAT showed good diagnostic accuracy of 88.6% for monitoring liver transplant patients. If validated externally, this DUS model could be utilised to diagnose HAS in liver transplant recipients.
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Affiliation(s)
- A Mohamed Afif
- Department of Diagnostic Radiology, Singapore General Hospital, Singapore.
| | - A P M Anthony
- Department of Diagnostic Radiology, Singapore General Hospital, Singapore
| | - S Jamaruddin
- Department of Diagnostic Radiology, Singapore General Hospital, Singapore
| | - S U Su'aidi
- Department of Diagnostic Radiology, Singapore General Hospital, Singapore
| | - H H Li
- Department of Health Serviced Research Unit, Singapore General Hospital, Singapore
| | - A S C Low
- Department of Diagnostic Radiology, Singapore General Hospital, Singapore
| | - E H T Cheong
- Department of Diagnostic Radiology, Singapore General Hospital, Singapore
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Ravaioli M, Prosperi E, Pinna A, Siniscalchi A, Fallani G, Frascaroli G, Maroni L, Odaldi F, Serenari M, Cescon M. Restoration of portal flow with varix in liver transplantation for patients with total portal vein thrombosis: An effective strategy in the largest center experience. Clin Transplant 2021; 35:e14303. [PMID: 33797802 DOI: 10.1111/ctr.14303] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2020] [Revised: 03/19/2021] [Accepted: 03/26/2021] [Indexed: 12/12/2022]
Abstract
INTRODUCTION Postoperative complications and worse prognosis still burden liver transplantations (LT) with complex portal vein thrombosis (CPVT). When an engorged left gastric vein (LGV) is present, the portal inflow is restorable with an anastomosis between the graft portal vein and the LGV of the recipient. We analyzed short- and long-term results of this procedure in 12 LT with CPVT. METHODS Between 2005 and 2019, 55 patients with CPVT underwent LT. We applied this technique in 12 patients. In six cases, we placed a vascular graft to obtain a tension-free structure. We evaluated patency, short- and long-term results. RESULTS No intraoperative complication was observed. The median duration of LT, blood transfusion, deceased donor age, and MELD score of the recipients were 7 h, 1250 mL, 72 years, and 19. Seven patients were affected by hepatocellular carcinoma. No major complications or PVT recurrence were observed. One patient required a liver re-transplantation for primary non-functioning syndrome. The mean hospital stay was 20 days. The actuarial patient survival was 85% with a mean FU of 4 years. The two late deaths were due to hepatocellular carcinoma recurrence and sepsis for cholangitis. CONCLUSIONS This technique in presence of both CPVT and engorged LGV is feasible and safe for patients, with good short- and long-term results.
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Affiliation(s)
- Matteo Ravaioli
- Department of General Surgery and Transplantation, IRCCS, Azienda Ospedaliero-Universitaria di Bologna, Bologna, Italy.,Department of General Surgery and Transplantation, University of Bologna, Bologna, Italy
| | - Enrico Prosperi
- Department of General Surgery and Transplantation, IRCCS, Azienda Ospedaliero-Universitaria di Bologna, Bologna, Italy
| | - Antonio Pinna
- Department of General Surgery and Transplantation, IRCCS, Azienda Ospedaliero-Universitaria di Bologna, Bologna, Italy
| | - Antonio Siniscalchi
- Department of General Surgery and Transplantation, IRCCS, Azienda Ospedaliero-Universitaria di Bologna, Bologna, Italy
| | - Guido Fallani
- Department of General Surgery and Transplantation, IRCCS, Azienda Ospedaliero-Universitaria di Bologna, Bologna, Italy
| | - Giacomo Frascaroli
- Department of General Surgery and Transplantation, IRCCS, Azienda Ospedaliero-Universitaria di Bologna, Bologna, Italy
| | - Lorenzo Maroni
- Department of General Surgery and Transplantation, IRCCS, Azienda Ospedaliero-Universitaria di Bologna, Bologna, Italy
| | - Federica Odaldi
- Department of General Surgery and Transplantation, IRCCS, Azienda Ospedaliero-Universitaria di Bologna, Bologna, Italy
| | - Matteo Serenari
- Department of General Surgery and Transplantation, IRCCS, Azienda Ospedaliero-Universitaria di Bologna, Bologna, Italy
| | - Matteo Cescon
- Department of General Surgery and Transplantation, IRCCS, Azienda Ospedaliero-Universitaria di Bologna, Bologna, Italy.,Department of General Surgery and Transplantation, University of Bologna, Bologna, Italy
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Mattay GS, O'Leary C, Dubroff JG, R Pantel A. 99mTc-Mebrofenin SPECT/CT in Hepatic Infarction. Clin Nucl Med 2021; 46:e8-e10. [PMID: 33031234 DOI: 10.1097/rlu.0000000000003312] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
A 68-year-old man with hereditary hypercoagulability was referred to nuclear medicine for elevated aminotransferases after a recent living-donor liver transplant. A hepatic infarction was suspected. A Tc-mebrofenin SPECT/CT was performed and showed decreased radiotracer uptake in a wedge-shaped distribution in the anterior liver suggestive of a hepatic infarction. Subsequently, an enhanced MRI corroborated the diagnosis. Oral anticoagulation therapy was then initiated, and aminotransferases soon normalized.
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Affiliation(s)
- Govind S Mattay
- From the Perelman School of Medicine at the University of Pennsylvania
| | - Cathal O'Leary
- Department of Radiology, Hospital of the University of Pennsylvania, Philadelphia, PA
| | - Jacob G Dubroff
- Department of Radiology, Hospital of the University of Pennsylvania, Philadelphia, PA
| | - Austin R Pantel
- Department of Radiology, Hospital of the University of Pennsylvania, Philadelphia, PA
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20
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Sonography of liver transplantation. Abdom Radiol (NY) 2021; 46:68-83. [PMID: 33043396 DOI: 10.1007/s00261-020-02799-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2020] [Revised: 09/27/2020] [Accepted: 09/29/2020] [Indexed: 10/23/2022]
Abstract
Orthotopic liver transplant (OLT) is established as the definitive treatment of choice for end stage liver disease. Over the years, refined surgical techniques as well as advancements in organ preservation and immunosuppressive regimens have improved graft and patient survival rates. Imaging has also contributed to improved graft and patient survival. Ultrasound is the initial investigation of choice for evaluation of post-transplant anatomy and for identifying early complications. A thorough knowledge of surgical techniques and normal post-operative appearance of the OLT is needed to accurately identify and characterize graft complications. The objective of this article is to review the sonographic findings of normal liver transplant as well as post-operative complications. Indications and contraindications for OLT as well as different surgical techniques will also be briefly reviewed.
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21
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Abstract
Liver transplantation has become a definitive treatment for patients with end-stage liver disease and those meeting Milan criteria for hepatocellular carcinoma. The morbidity and mortality associated with liver transplantation continues to decrease thanks to refinements in surgical technique, immunosuppression, and imaging. In particular, imaging plays a vital role by facilitating early detection of post-operative complications and enabling prompt treatment. Post-operative complications that lead to graft failure and patient morbidity/mortality can be generally categorized as vascular, biliary, parenchymal, and malignant. Vascular complications include stenosis and thrombosis of the hepatic artery, portal vein, and inferior vena cava; hepatic artery pseudoaneurysm; arteriovenous fistula; and celiac stenosis. Biliary abnormalities include strictures, bile leak, obstruction, recurrent disease, and infection. While imaging is not primarily utilized to diagnose allograft rejection, it plays an important role in excluding mechanical causes of graft dysfunction that can mimic rejection. Ultrasound is routinely performed as the first-line imaging evaluation for the detection and follow-up of early and delayed complications. Cholangiography and magnetic resonance cholangiopancreatography are useful in detecting and characterizing biliary complications. Computed tomography is often used to further evaluate abnormal findings on ultrasound or for the characterization of post-operative fluid collections. The aim of this review is to discuss and illustrate the imaging findings of complications associated with liver transplantation and their role in facilitating treatment.
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Cawich SO, Johnson P, Gardner MT, Pearce NW, Sinanan A, Gosein M, Shah S. Venous drainage of the left liver: an evaluation of anatomical variants and their clinical relevance. Clin Radiol 2020; 75:964.e1-964.e6. [PMID: 32958222 DOI: 10.1016/j.crad.2020.07.039] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2020] [Accepted: 07/02/2020] [Indexed: 11/17/2022]
Abstract
AIM To evaluate the variations in venous drainage from the left liver. MATERIALS AND METHODS A retrospective evaluation was performed of all consecutive abdominal computed tomography (CT) examinations at a tertiary referral facility between 1 January and 30 June 2018. Osirix (Pixmeo SARL, Bernex, Switzerland) was used to examine the major hepatic veins and their tributaries in each scan. The classification of variants as proposed by Nakamura and Tsuzuki was used to describe the findings. The following information was collected: ramification pattern, number, length and diameter of middle (MHV) and left (LHV) hepatic vein tributaries. Two researchers collected data independently, and the average measurements were used as the final dimensions. RESULTS Of 102 examinations evaluated, only 27 demonstrated the conventional venous drainage patterns. The LHV and MHV combined to form a common trunk that emptied into the inferior vena cava (IVC) in 75 (73.5%) cases. The common trunk had a mean length of 8.89 mm and mean diameter of 20.18 mm. Other patterns included Nakamura and Tsuzuki type I (27.5%), type II (29.4%) and type III variants (16.7%). In addition, 4.9% of patients had absent superior middle veins and 80% had supernumerary short hepatic veins (4%). CONCLUSION Only 26.5% of patients in this population had conventional venous drainage from the left liver. Surgeons and radiologists in hepatobiliary practice should be aware of these variants in order to minimise morbidity when performing invasive procedures.
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Affiliation(s)
- S O Cawich
- Department of Surgery, General Hospital, Port of Spain, Trinidad and Tobago.
| | - P Johnson
- Department of Surgery, Radiology, Anaesthetics and Intensive Care, Faculty of Medical Sciences, University of the West Indies, Mona Campus, Kingston 7, Jamaica
| | - M T Gardner
- Department of Basic Medical Sciences, University of the West Indies, Mona Campus, Kingston 7, Jamaica
| | - N W Pearce
- University Surgical Unit, Southampton General Hospital, Southampton, UK
| | | | - M Gosein
- Department of Surgery, General Hospital, Port of Spain, Trinidad and Tobago
| | - S Shah
- Department of Surgery, Radiology, Anaesthetics and Intensive Care, Faculty of Medical Sciences, University of the West Indies, Mona Campus, Kingston 7, Jamaica
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23
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Chang WC, M Yeh B, Chu L, Kim SY, Wen KW, Chiu SH, Ding CKC, Wu EH, Roberts JP, Huang GS, Hsu HH. Post-operative assessment in patients after liver transplantation: imaging parameters associated with 1-year graft failure. Eur Radiol 2020; 31:764-774. [PMID: 32862291 DOI: 10.1007/s00330-020-07124-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2020] [Revised: 06/08/2020] [Accepted: 07/30/2020] [Indexed: 10/23/2022]
Abstract
PURPOSE To identify post-liver transplant CT findings which predict graft failure within 1 year. MATERIALS AND METHODS We evaluated the CT scans of 202 adult liver transplants performed in our institution who underwent CT within 3 months after transplantation. We recorded CT findings of liver perfusion defect (LPD), parenchymal homogeneity, and the diameters and attenuations of the hepatic vessels. Findings were correlated to 1-year graft failure, and interobserver variability was assessed. RESULTS Forty-one (20.3%) of the 202 liver grafts failed within 1 year. Graft failure was highly associated with LPD (n = 18/25, or 67%, versus 15/98, or 15%, p < 0.001), parenchymal hypoattenuation (n = 20/41, or 48.8% versus 17/161, or 10.6%, p < 0.001), and smaller diameter of portal veins (right portal vein [RPV], 10.7 ± 2.7 mm versus 14.7 ± 2.2 mm, and left portal vein [LPV], 9.8 ± 3.0 mm versus 12.4 ± 2.2 mm, p < 0.001, respectively). Of these findings, LPD (hazard ratio [HR], 5.43, p < 0.001) and small portal vein diameters (HR, RPV, 3.33, p < 0.001, and LPV, 3.13, p < 0.05) independently predicted graft failure. All the measurements showed fair to moderate interobserver agreement (0.233~0.597). CONCLUSION For patients who have CT scan within the first 3 months of liver transplantation, findings of LPD and small portal vein diameters predict 1-year graft failure. KEY POINTS •Failed grafts are highly associated with liver perfusion defect, hypoattenuation, and small portal vein. •Right portal vein < 11.5 mm and left portal vein < 10.0 mm were associated with poor graft outcome. •Liver perfusion defect and small portal vein diameter independently predicted graft failure.
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Affiliation(s)
- Wei-Chou Chang
- Department of Radiology, Tri-Service General Hospital and National Defense Medical Center, Taipei, Taiwan.
| | - Benjamin M Yeh
- Department of Radiology and Biomedical Imaging, University of California San Francisco, San Francisco, CA, USA
| | - Lisa Chu
- Department of Radiology, Palo Alto Medical Foundation, Palo Alto, CA, USA
| | - So Yeon Kim
- Department of Radiology and Research Institute of Radiology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, South Korea
| | - Kwun Wah Wen
- Department of Pathology, University of California San Francisco, San Francisco, CA, USA
| | - Sung-Hua Chiu
- Department of Radiology, Tri-Service General Hospital and National Defense Medical Center, Taipei, Taiwan
| | | | - En-Haw Wu
- Department of Radiology, University of Washington, Seattle, WA, USA
| | - John P Roberts
- Division of Transplant Surgery, Department of Surgery, University of California San Francisco, San Francisco, CA, USA
| | - Guo-Shu Huang
- Department of Radiology, Tri-Service General Hospital and National Defense Medical Center, Taipei, Taiwan
| | - Hsian-He Hsu
- Department of Radiology, Tri-Service General Hospital and National Defense Medical Center, Taipei, Taiwan
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Abdominal Applications of Pediatric Body MR Angiography: Tailored Optimization for Successful Outcome. AJR Am J Roentgenol 2020; 215:206-214. [PMID: 32374667 DOI: 10.2214/ajr.19.22289] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
OBJECTIVE. The purpose of this article is to summarize current common techniques and indications for pediatric abdominopelvic MR angiography and strategies for optimizing them to achieve successful outcomes. We also discuss newer MR angiography techniques, including whole-body imaging and blood pool contrast agents, as well as various approaches to reducing the need for anesthesia in pediatric MRI. CONCLUSION. Pediatric body vascular imaging presents a unique set of challenges that require a tailored approach. Emerging pediatric abdominopelvic MR angiography techniques hold promise for continued improvement in pediatric body MR angiography.
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Zacarias MS, Pria HRFD, de Oliveira RAS, Delmonte LF, Velloni FG, D'Ippolito G. Non-neoplastic cholangiopathies: an algorithmic approach. Radiol Bras 2020; 53:262-272. [PMID: 32904723 PMCID: PMC7458557 DOI: 10.1590/0100-3984.2019.0069] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Cholangiopathies are chronic diseases that affect the bile ducts, comprising a heterogeneous group of progressive and potentially fatal entities. The diagnosis of these diseases is a great challenge for radiologists because of the overlapping of their clinical, biochemical, and imaging findings. Nevertheless, identifying the precise etiology is crucial, given that the therapeutic options are distinct and influence the prognosis of the patient. The purpose of this review article is to discuss some of the non-neoplastic causes of cholangiopathies and to provide a useful diagnostic algorithm.
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Affiliation(s)
- Marina Silva Zacarias
- Departamento de Diagnóstico por Imagem - Escola Paulista de Medicina da Universidade Federal de São Paulo (EPM-Unifesp), São Paulo, SP, Brazil
| | - Hanna Rafaela Ferreira Dalla Pria
- Departamento de Diagnóstico por Imagem - Escola Paulista de Medicina da Universidade Federal de São Paulo (EPM-Unifesp), São Paulo, SP, Brazil
| | - Rafael Andrade Santiago de Oliveira
- Departamento de Diagnóstico por Imagem - Escola Paulista de Medicina da Universidade Federal de São Paulo (EPM-Unifesp), São Paulo, SP, Brazil
| | - Luis Fernando Delmonte
- Departamento de Diagnóstico por Imagem - Escola Paulista de Medicina da Universidade Federal de São Paulo (EPM-Unifesp), São Paulo, SP, Brazil
| | - Fernanda Garozzo Velloni
- Departamento de Diagnóstico por Imagem - Escola Paulista de Medicina da Universidade Federal de São Paulo (EPM-Unifesp), São Paulo, SP, Brazil
| | - Giuseppe D'Ippolito
- Departamento de Diagnóstico por Imagem - Escola Paulista de Medicina da Universidade Federal de São Paulo (EPM-Unifesp), São Paulo, SP, Brazil
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Ma L, Chen K, Yang L, Wang H, Lu Q, Luo Y. Ultrasonographic hemodynamics for prediction of poor liver regeneration induced by severe portal vein stenosis in rats. ANNALS OF TRANSLATIONAL MEDICINE 2020; 8:527. [PMID: 32411750 PMCID: PMC7214903 DOI: 10.21037/atm.2020.04.21] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Background Insufficient portal vein blood flow, such as portal vein stenosis (PVS), plays a significant influence on liver regeneration. Early prediction of poor liver regeneration induced by severe PVS is critical. Ultrasound serves as a first-line imaging technique in diagnosing PVS based on the changes of portal vein hemodynamics. However, there is still no consensus on the criteria for evaluating the degree of PVS. Moreover, which degree of PVS can induce poor liver regeneration still is unclear. Therefore, it is essential to determine the stenosis degree that leads to significantly poor liver regeneration and to evaluate the value of ultrasonographic hemodynamics for predicting poor liver regeneration induced by severe PVS. Methods Rats were randomly subjected to sham operation rats group (SOR), PH group (group A), and PVS groups with mild, moderate, or severe stenosis flowing PH (groups B-D). PH group was set up a model of 70% hepatectomy, and PVS groups were produced by different degrees of partial portal vein ligation following PH. In the SOR group and PH group, the portal vein diameter (PVD) and portal vein velocity (PVV) were measured by Ultrasound at preoperative and postoperative 1, 3, 7, and 14 d. In PVS groups, PVD and PVV at the stenotic (PVDs, PVVs) and pre-stenotic (PVDpre, PVVpre) sites were also detected on 1, 3, 7, and 14 d after surgery, calculating the diameter stenosis ratio (DSR) and accelerating blood flow velocity ratio (AVR). Rats were sacrificed at 1, 3, 7, and 14 d post-surgery, and the expression of proliferating cell nuclear antigen (PCNA) and the liver regeneration rate (LRR) at 14 d were evaluated. The PVVs, DSR, and AVR in the different groups were analyzed combined with the status of liver regeneration, and receiver operating characteristic (ROC) analysis was also applied to assess the value of PVVs, DSR, and AVR in diagnosing severe PVS and the resulting poor liver regeneration. Results Seventy-two rat models of different degrees of PVS were successfully set up following 70% PH. The stenosis ratios (SRs) of each PVS group were 45.16%±3.44%, 59.21%±3.83%, and 69.56%±2.16%, respectively. Poor liver regeneration appeared to be significant when PVS was greater than 65% (group D), of which the LRR at 14 d was significantly lower compared to PH group (group A) and PVS groups with SR ≤50% (group B) and SR >50-65% (group C), respectively (all P<0.05). Meanwhile, PCNA expression of group D was significantly lower compared to group C at 1 d and groups A-C at 3 d (all P<0.05). Differences were also detected at 3 d between groups A and B and groups A and C (both P<0.05). Among PVS groups, PVVs accelerated dramatically, with significant differences demonstrated between group D and groups B and C at 1 d, as well as group B and groups C and D at 3 d (all P<0.05). At 1, 3, and 7 d, DSR of groups C and D were significantly higher than that of group A (all P<0.05). At 1 and 3 d, AVR of group D was significantly higher than that of groups B and C (all P<0.05). ROC analysis showed the AUC of PVVs at 1 d in diagnosing severe PVS was 0.84, while at 3 d, it was unable to differentiate from mild-moderate or severe PVS by PVVs (P>0.05 vs. AUC =0.50). At 1 and 3 d, the AUC of DSR and AVR in diagnosing severe PVS were all greater than 0.80, comparatively much better in AVR (AUC >0.95). The best cut-off points of AVR at 1 and 3 d were 6.91 and 5.36, with the sensitivity and specificity respectively 100%, 91.67% at 1 d, and 100%, 83.33% at 3 d. Conclusions Poor liver regeneration could be significantly induced when PVS was greater than 65%. Ultrasound can well prove the changes of portal vein hemodynamics in different degrees of PVS in rats. The parameters PVVs could be regarded as a valid index for diagnosing PVS but were not applicable for evaluating the stenosis degree. Comparatively, the parameters DSR and AVR, especially AVR, proved to be useful for differentiating severe PVS (>65%) in the early postoperative period, predicting the resulting poor liver regeneration.
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Affiliation(s)
- Lin Ma
- Department of Ultrasound, West China Hospital of Sichuan University, Chengdu 610041, China
| | - Kefei Chen
- Department of Liver and Vascular Surgery, West China Hospital of Sichuan University, Chengdu 610041, China
| | - Lulu Yang
- Department of Ultrasound, West China Hospital of Sichuan University, Chengdu 610041, China
| | - Hong Wang
- Department of Ultrasound, West China Hospital of Sichuan University, Chengdu 610041, China
| | - Qiang Lu
- Department of Ultrasound, West China Hospital of Sichuan University, Chengdu 610041, China
| | - Yan Luo
- Department of Ultrasound, West China Hospital of Sichuan University, Chengdu 610041, China
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AIUM Practice Parameter for the Performance of an Ultrasound Examination of Solid-Organ Transplants. JOURNAL OF ULTRASOUND IN MEDICINE : OFFICIAL JOURNAL OF THE AMERICAN INSTITUTE OF ULTRASOUND IN MEDICINE 2020; 39:E30-E38. [PMID: 32163638 DOI: 10.1002/jum.15261] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
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Calvo-Imirizaldu M, Ezponda Casajús A, Soriano Aguadero I, Benito Boillos A, Cano Rafart D. Normal and transitory ultrasonography findings in the immediate postoperative period after liver transplantation. RADIOLOGIA 2020. [DOI: 10.1016/j.rxeng.2020.02.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Calvo-Imirizaldu M, Ezponda Casajús A, Soriano Aguadero I, Benito Boillos A, Cano Rafart D. Normal and transitory ultrasonography findings in the immediate postoperative period after liver transplantation. RADIOLOGIA 2019; 62:112-121. [PMID: 31866060 DOI: 10.1016/j.rx.2019.11.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2019] [Revised: 11/10/2019] [Accepted: 11/12/2019] [Indexed: 11/30/2022]
Abstract
OBJECTIVE Liver transplantation is one of the treatments for patients with advanced stage chronic liver disease and for selected patients with hepatic tumors. Ultrasonography is the first-choice imaging technique to evaluate liver transplants. This article reviews the surgical technique, anatomy, and normal findings on ultrasonography in the immediate postoperative period in patients who have undergone liver transplantation, which will be used as a reference in follow-up studies. CONCLUSION Early vascular (arterial and portal) complications can represent a threat for the graft or the patient. During the period after liver transplantation, the patient is recovering from surgery and the transplanted organ is adapting to its new environment. In this period, ultrasonography can show alterations in the parenchyma or Doppler findings that would be considered abnormal in other situations; these findings are usually transitory. Knowing how to interpret them is key to detecting or ruling out complications.
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Affiliation(s)
- M Calvo-Imirizaldu
- Servicio de Radiología, Clínica Universidad de Navarra, Pamplona, Navarra, España.
| | - A Ezponda Casajús
- Servicio de Radiología, Clínica Universidad de Navarra, Pamplona, Navarra, España
| | - I Soriano Aguadero
- Servicio de Radiología, Clínica Universidad de Navarra, Pamplona, Navarra, España
| | - A Benito Boillos
- Servicio de Radiología, Clínica Universidad de Navarra, Pamplona, Navarra, España
| | - D Cano Rafart
- Servicio de Radiología, Clínica Universidad de Navarra, Pamplona, Navarra, España
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Herrmann J, Tozakidou M, Busch J, Herden U, Fischer L, Groth M, Petersen KU, Helmke K. Persistence of post-operative color Doppler abnormalities is linked to reduced graft survival in pediatric patients after liver transplantation. Pediatr Transplant 2019; 23:e13593. [PMID: 31587463 DOI: 10.1111/petr.13593] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/06/2019] [Revised: 09/02/2019] [Accepted: 09/05/2019] [Indexed: 01/04/2023]
Abstract
Color Doppler US is a readily available imaging modality for the evaluation of liver transplants. The aim of our study was to evaluate the temporal course of color Doppler US findings in children after LTX and to investigate the effect of resolving and persisting abnormalities during follow-up on long-term outcome. All children who underwent LTX during January 2000 until December 2003 (155 LTX in 137 patients, 75 male and 62 female; mean age at LTX 4.1 ± 4.8 years; range, 0.1-16.3 years) were retrospectively evaluated. Following a predefined ultrasound protocol with prospective documentation, intraoperative, post-operative, and follow-up examinations were evaluated for color Doppler abnormalities. The time of occurrence and temporal course of the findings were recorded. Graft survival rates and graft survival times were compared. Abnormal color Doppler US examinations were noted in 98 of 155 grafts during the entire observational period (63.2%). In 57 of 98 grafts (58.2%), abnormalities were limited to the perioperative period (<30 days after LTX). Survival of grafts with transient perioperative abnormalities was similar to transplantations with regular color Doppler US examinations (graft survival rates, 80.7% vs 84.2%, P = .622; mean graft survival time, 2596.92 vs 2511.40 days, P = .67). Grafts with persisting color Doppler US abnormalities in the follow-up period (>30 days after LTX; 37/98 LTX, 37.8%) showed reduced survival compared with regular courses (graft survival rate 62.2% vs 80.7%, P = .047), indicating underlying organ-specific alterations. Standardized longitudinal evaluation during the perioperative and the follow-up period can enhance the prognostic capabilities of color Doppler US in children following LTX.
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Affiliation(s)
- Jochen Herrmann
- Department of Pediatric Radiology, Diagnostic and Interventional Radiology and Nuclear Medicine, University Clinic Hamburg-Eppendorf, Hamburg, Germany
| | - Magdalini Tozakidou
- Department of Pediatric Radiology, Diagnostic and Interventional Radiology and Nuclear Medicine, University Clinic Hamburg-Eppendorf, Hamburg, Germany
| | - Jasmin Busch
- Department of Pediatric Radiology, Diagnostic and Interventional Radiology and Nuclear Medicine, University Clinic Hamburg-Eppendorf, Hamburg, Germany
| | - Uta Herden
- Department of Hepatobiliary Surgery, University Clinic Hamburg-Eppendorf, Hamburg, Germany
| | - Lutz Fischer
- Department of Hepatobiliary Surgery, University Clinic Hamburg-Eppendorf, Hamburg, Germany
| | - Michael Groth
- Department of Pediatric Radiology, Diagnostic and Interventional Radiology and Nuclear Medicine, University Clinic Hamburg-Eppendorf, Hamburg, Germany
| | - Kay U Petersen
- Department of Psychiatry and Psychotherapy, University Hospital Tübingen, Tübingen, Germany
| | - Knut Helmke
- Department of Pediatric Radiology, Diagnostic and Interventional Radiology and Nuclear Medicine, University Clinic Hamburg-Eppendorf, Hamburg, Germany
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Abstract
Abdominal pain is a common cause for emergency department visits in the United States, and biliary tract disease is the fifth most common cause of hospital admission. Common causes of acute hepatobiliary include gallstones and its associated complications and multiple other hepatobiliary etiologies, including infectious, inflammatory, vascular, and neoplastic causes. Postoperative complications of the biliary tract can result in an acute abdomen. Imaging of the hepatobiliary tree is integral in the diagnostic evaluation of acute hepatobiliary dysfunction, and imaging of the biliary tree requires a multimodality approach utilizing ultrasound, computed tomography, nuclear medicine, and MR imaging.
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Affiliation(s)
- HeiShun Yu
- Department of Radiology, Brigham and Women's Hospital, 75 Francis Street, Boston, MA 02115, USA
| | - Jennifer W Uyeda
- Department of Radiology, Brigham and Women's Hospital, 75 Francis Street, Boston, MA 02115, USA.
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Abstract
We present a case-based review of abdominal postoperative complications, organized by organ system affected, including wound/superficial, hepatobiliary, pancreatic, gastrointestinal, genitourinary, and vascular complications. Both general complications and specific considerations for certain types of operations are described, as well as potential pitfalls that can be confused with complications. Representative cases are shown using all relevant imaging modalities, including CT, fluoroscopy, ultrasound, MRI, and nuclear medicine. Management options are also described, highlighting those that require radiologist input or intervention.
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Affiliation(s)
- Ryan B O'Malley
- Department of Radiology, Abdominal Imaging, University of Washington, 1959 Northeast Pacific Street, Box 357115, Seattle, WA 98195, USA.
| | - Jonathan W Revels
- Department of Radiology, Body and Thoracic Imaging, University of New Mexico, Albuquerque, NM, USA
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Delgado-Moraleda JJ, Ballester-Vallés C, Marti-Bonmati L. Role of imaging in the evaluation of vascular complications after liver transplantation. Insights Imaging 2019; 10:78. [PMID: 31414188 PMCID: PMC6694376 DOI: 10.1186/s13244-019-0759-x] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2019] [Accepted: 06/18/2019] [Indexed: 12/15/2022] Open
Abstract
Clinical manifestations of liver transplantation complications can be subtle and non-specific. Medical imaging, mainly Doppler ultrasound, plays an important role to detect and grade these. Colour Doppler ultrasound exams are routinely performed at 24–48 h, on the 7th day, the first and third month after transplantation. MDCT and MR images are acquired based on the Doppler ultrasound (DUS) findings, even in the absence of abnormal liver function. As vascular complications appear early after surgery, DUS should be performed by experience personnel. Diagnostic angiography is seldom performed. This pictorial review illustrates the key imaging findings of vascular complications in patients with liver transplantation: hepatic artery complications (such as thrombosis, stenosis of the anastomosis and pseudoaneurysms), portal vein abnormalities (such as occlusion and stenosis) and hepatic veins and/or inferior vena cava flow changes (Budd-Chiari syndrome).
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Affiliation(s)
- Juan-José Delgado-Moraleda
- Medical Imaging Department and Biomedical Imaging Research Group (GIBI230), La Fe Polytechnics and University Hospital and Health Research Institute, Valencia, Spain.
| | - Carmen Ballester-Vallés
- Medical Imaging Department and Biomedical Imaging Research Group (GIBI230), La Fe Polytechnics and University Hospital and Health Research Institute, Valencia, Spain
| | - Luis Marti-Bonmati
- Medical Imaging Department and Biomedical Imaging Research Group (GIBI230), La Fe Polytechnics and University Hospital and Health Research Institute, Valencia, Spain
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Chen S, Wang X, Zhang B, Liu B, Pan H. Meta-analysis of the diagnostic value of contrast-enhanced ultrasound for the detection of vascular complications after liver transplantation. REVISTA ESPANOLA DE ENFERMEDADES DIGESTIVAS 2018; 111:388-396. [PMID: 30569729 DOI: 10.17235/reed.2018.5818/2018] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
BACKGROUND contrast-enhanced ultrasound (CEUS) is increasingly used to identify vascular complications in patients after liver transplantation. The present study aimed to evaluate the diagnostic accuracy of CEUS using all available data. MATERIALS AND METHODS relevant studies published before February 2018 were retrieved from PubMed, EMBASE, ScienceDirect and Web of Science. Pooled sensitivity and specificity, diagnostic odds ratio (DOR) and summary receiver operating characteristic curve (SROC) were calculated to estimate the diagnostic performance of CEUS for vascular complications. Sensitivity analysis was performed that stratified studies according to age, study design and sample size in order to determine the influence of these factors on the overall effect. Meta-regression analyses were performed to examine the possible sources of heterogeneity. Quality assessment and publication bias of the included studies were also evaluated. RESULTS thirteen studies which consisted of 2,781 CEUS cases were included in the analysis. The pooled weighted estimates of sensitivity and specificity were 0.90 (95% CI, 0.84 to 0.95) and 1.00 (95% CI, 1.00 to 1.00), the diagnostic odds ratio (DOR) was 431.96 (95% CI, 164.60 to 1,133.59) and the area under the curve (AUC) of SROC was 0.9741. According to the sensitivity analysis, age, study design and sample size had an insignificant influence on the diagnostic performance of CEUS. The meta-regression analyses did not reveal a strong correlation between CEUS accuracy and study design, treatment time of patients and experience of the radiologists. CONCLUSION the results of our meta-analysis showed a high sensitivity, specificity and accuracy of the CEUS modality for the identification of vascular complications in patients after liver transplantation. Since this is the first meta-analysis investigating in this aspect, more evidence is required to validate the clinical utility of CEUS for the identification of vascular complications in patients with a transplanted liver.
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Byun J, Kim KW, Choi SH, Lee S, Lee J, Song GW, Lee SG. Indirect Doppler ultrasound abnormalities of significant portal vein stenosis after liver transplantation. J Med Ultrason (2001) 2018; 46:89-98. [PMID: 30094765 DOI: 10.1007/s10396-018-0894-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2018] [Accepted: 07/17/2018] [Indexed: 01/10/2023]
Abstract
PURPOSE To determine indirect Doppler ultrasound (DUS) abnormalities associated with significant portal vein (PV) stenosis (PVS) in recipients of liver transplantation (LT). METHODS This retrospective study was approved by our institutional review board. Between February 2006 and May 2017, 41 LT recipients were diagnosed with significant PVS, defined as having more than 50% narrowing of PV diameter for any reason, including thrombosis or flow disturbance associated with prominent collateral vessels on portal venography. We reviewed the DUS findings of hepatic arteries (HAs) as well as PVs of them, before and after treatment of PVS, and in comparison, with a one-to-one case-matched control. Inter-group comparison of frequency in DUS abnormalities was performed using Chi square (χ2) with Fisher's exact test and McNemar's test. Diagnostic values of each abnormal DUS finding and combinations were also evaluated. RESULTS DUS of significant PVS showed "no demonstrable color flow," either at recipient PVs or anastomoses (26.7%), and showed turbulence (66.7%) and hepatofugal portal flow (HFPF; 20.0%) at the graft PVs. HFPF was more frequently observed in those with "no demonstrable color flow" at recipient PVs or anastomoses (p = 0.006). DUS of graft HAs revealed tardus-parvus waveforms (20.9%) and prolonged systolic acceleration times (16.3%), more commonly in the "no demonstrable color flow" group (p = 0.012). These indirect DUS abnormalities disappeared and resolved on follow-up DUS after treatment. In the control group, such Doppler abnormalities were less frequently shown than in the PVS group (p ≤ 0.01, respectively). When one of the portal-blood flow velocity (PFV)-related index abnormalities (such as increased time average velocity [TAV] at anastomosis and TAV ratio between recipient PV and anastomosis) or "no demonstrable color flow" were shown in DUS as well as one of the indirect DUS abnormalities, sensitivity, and specificity was 71.11 and 97.78%, respectively. CONCLUSION In addition to PFV-related abnormalities, DUS occasionally shows "no demonstrable color flow" either at recipient PVs or anastomoses, and indirect Doppler abnormalities such as turbulence, HFPF at graft PVs, and abnormal waveforms at graft HAs in LT recipients with significant PVS. The combination of PFV-related abnormalities and indirect DUS abnormalities would be helpful for diagnosis of PVS.
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Affiliation(s)
- Jieun Byun
- Department of Radiology and Research Institute of Radiology, University of Ulsan College of Medicine, Asan Medical Center, 88 Olympic-Ro 43-Gil, Songpa-Gu, Seoul, 05505, South Korea
| | - Kyoung Won Kim
- Department of Radiology and Research Institute of Radiology, University of Ulsan College of Medicine, Asan Medical Center, 88 Olympic-Ro 43-Gil, Songpa-Gu, Seoul, 05505, South Korea.
| | - Sang Hyun Choi
- Department of Radiology and Research Institute of Radiology, University of Ulsan College of Medicine, Asan Medical Center, 88 Olympic-Ro 43-Gil, Songpa-Gu, Seoul, 05505, South Korea
| | - Sunyoung Lee
- Department of Radiology and Research Institute of Radiology, University of Ulsan College of Medicine, Asan Medical Center, 88 Olympic-Ro 43-Gil, Songpa-Gu, Seoul, 05505, South Korea
| | - Jeongjin Lee
- School of Computer Science and Engineering, Soongsil University, Seoul, South Korea
| | - Gi Won Song
- Division of Liver Transplantation and Hepatobiliary Surgery, Departments of Surgery, University of Ulsan College of Medicine, Asan Medical Center, Seoul, South Korea
| | - Sung Gyu Lee
- Division of Liver Transplantation and Hepatobiliary Surgery, Departments of Surgery, University of Ulsan College of Medicine, Asan Medical Center, Seoul, South Korea
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Piao D, Hawxby A, Wright H, Rubin EM. Perspective review on solid-organ transplant: needs in point-of-care optical biomarkers. JOURNAL OF BIOMEDICAL OPTICS 2018; 23:1-14. [PMID: 30160078 DOI: 10.1117/1.jbo.23.8.080601] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/23/2018] [Accepted: 08/02/2018] [Indexed: 06/08/2023]
Abstract
Solid-organ transplant is one of the most complex areas of modern medicine involving surgery. There are challenging opportunities in solid-organ transplant, specifically regarding the deficiencies in pathology workflow or gaps in pathology support, which may await alleviations or even de novo solutions, by means of point-of-care, or point-of-procedure optical biomarkers. Focusing the discussions of pathology workflow on donor liver assessment, we analyze the undermet need for intraoperative, real-time, and nondestructive assessment of the donor injuries (such as fibrosis, steatosis, and necrosis) that are the most significant predictors of post-transplant viability. We also identify an unmet need for real-time and nondestructive characterization of ischemia or irreversible injuries to the donor liver, earlier than appearing on morphological histology examined with light microscopy. Point-of-procedure laparoscopic optical biomarkers of liver injuries and tissue ischemia may also facilitate post-transplant management that is currently difficult for or devoid of pathological consultation due to lack of tools. The potential and pitfalls of point-of-procedure optical biomarkers for liver assessment are exemplified in breadth for steatosis. The more general and overarching challenges of point-of-procedure optical biomarkers for liver transplant pathology, including the shielding effect of the liver capsule that was quantitated only recently, are projected. The technological and presentational benchmarks that a candidate technology of point-of-procedure optical biomarkers for transplant pathology must demonstrate to motivate clinical translation are also foreseen.
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Affiliation(s)
- Daqing Piao
- Oklahoma State University, School of Electrical and Computer Engineering, Stillwater, Oklahoma, United States
- Oklahoma State University, Department of Veterinary Clinical Sciences, Center for Veterinary Health, United States
| | - Alan Hawxby
- University of Oklahoma Health Sciences Center, Oklahoma Transplant Center, Oklahoma City, Oklahoma, United States
| | - Harlan Wright
- University of Oklahoma Health Sciences Center, Oklahoma Transplant Center, Oklahoma City, Oklahoma, United States
| | - Erin M Rubin
- University of Oklahoma Health Sciences Center, Department of Pathology, Oklahoma City, Oklahoma, United States
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Rao HB, Prakash A, Sudhindran S, Venu RP. Biliary strictures complicating living donor liver transplantation: Problems, novel insights and solutions. World J Gastroenterol 2018; 24:2061-2072. [PMID: 29785075 PMCID: PMC5960812 DOI: 10.3748/wjg.v24.i19.2061] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/28/2018] [Revised: 04/28/2018] [Accepted: 05/11/2018] [Indexed: 02/06/2023] Open
Abstract
Biliary stricture complicating living donor liver transplantation (LDLT) is a relatively common complication, occurring in most transplant centres across the world. Cases of biliary strictures are more common in LDLT than in deceased donor liver transplantation. Endoscopic management is the mainstay for biliary strictures complicating LDLT and includes endoscopic retrograde cholangiography, sphincterotomy and stent placement (with or without balloon dilatation). The efficacy and safety profiles as well as outcomes of endoscopic management of biliary strictures complicating LDLT is an area that needs to be viewed in isolation, owing to its unique set of problems and attending complications; as such, it merits a tailored approach, which is yet to be well established. The diagnostic criteria applied to these strictures are not uniform and are over-reliant on imaging studies showing an anastomotic narrowing. It has to be kept in mind that in the setting of LDLT, a subjective anastomotic narrowing is present in most cases due to a mismatch in ductal diameters. However, whether this narrowing results in a functionally significant narrowing is a question that needs further study. In addition, wide variation in the endotherapy protocols practised in most centres makes it difficult to interpret the results and hampers our understanding of this topic. The outcome definition for endotherapy is also heterogenous and needs to be standardised to allow for comparison of data in this regard and establish a clinical practice guideline. There have been multiple studies in this area in the last 2 years, with novel findings that have provided solutions to some of these issues. This review endeavours to incorporate these new findings into the wider understanding of endotherapy for biliary strictures complicating LDLT, with specific emphasis on diagnosis of strictures in the LDLT setting, endotherapy protocols and outcome definitions. An attempt is made to present the best management options currently available as well as directions for future research in the area.
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Affiliation(s)
- Harshavardhan B Rao
- Department of Gastroenterology, Amrita Institute of Medical Sciences, Amrita University, Kochi 682041, India
| | - Arjun Prakash
- Department of Gastroenterology, Amrita Institute of Medical Sciences, Amrita University, Kochi 682041, India
| | - Surendran Sudhindran
- Department of Transplant and Vascular Surgery, Amrita Institute of Medical Sciences, Amrita University, Kochi 682041, India
| | - Rama P Venu
- Department of Gastroenterology, Amrita Institute of Medical Sciences, Amrita University, Kochi 682041, India
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Horvat N, Marcelino ASZ, Horvat JV, Yamanari TR, Batista Araújo-Filho JDA, Panizza P, Seda-Neto J, Antunes da Fonseca E, Carnevale FC, Mendes de Oliveira Cerri L, Chapchap P, Cerri GG. Pediatric Liver Transplant: Techniques and Complications. Radiographics 2018; 37:1612-1631. [PMID: 29019744 DOI: 10.1148/rg.2017170022] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Liver transplant is considered to be the last-resort treatment approach for pediatric patients with end-stage liver disease. Despite the remarkable advance in survival rates, liver transplant remains an intricate surgery with significant morbidity and mortality. Early diagnosis of complications is crucial for patient survival but is challenging given the lack of specificity in clinical presentation. Knowledge of the liver and vascular anatomy of the donor and the recipient or recipients before surgery is also important to avoid complications. In this framework, radiologists play a pivotal role on the multidisciplinary team in both pre- and postoperative scenarios by providing a road map to guide the surgery and by assisting in diagnosis of complications. The most common complications after liver transplant are (a) vascular, including the hepatic artery, portal vein, hepatic veins, and inferior vena cava; (b) biliary; (c) parenchymal; (d) perihepatic; and (e) neoplastic. The authors review surgical techniques, the role of each imaging modality, normal posttransplant imaging features, types of complications after liver transplant, and information required in the radiology report that is critical to patient care. They present an algorithm for an imaging approach for pediatric patients after liver transplant and describe key points that should be included in radiologic reports in the pre- and postoperative settings. Online supplemental material is available for this article. ©RSNA, 2017.
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Affiliation(s)
- Natally Horvat
- From the Departments of Radiology (N.H., A.S.Z.M., T.R.Y., J.d.A.B.A.F., P.P., L.M.d.O.C., G.G.C.), Surgery (J.S.N., E.A.d.F., P.C.), and Interventional Radiology (F.C.C.), Hospital Sírio-Libanês, Rua Dona Adma Jafet 91, São Paulo, SP 01308-050, Brazil; and Department of Radiology, University of São Paulo, São Paulo, Brazil (N.H., J.V.H., J.d.A.B.A.F., F.C.C., G.G.C.)
| | - Antonio Sergio Zafred Marcelino
- From the Departments of Radiology (N.H., A.S.Z.M., T.R.Y., J.d.A.B.A.F., P.P., L.M.d.O.C., G.G.C.), Surgery (J.S.N., E.A.d.F., P.C.), and Interventional Radiology (F.C.C.), Hospital Sírio-Libanês, Rua Dona Adma Jafet 91, São Paulo, SP 01308-050, Brazil; and Department of Radiology, University of São Paulo, São Paulo, Brazil (N.H., J.V.H., J.d.A.B.A.F., F.C.C., G.G.C.)
| | - Joao Vicente Horvat
- From the Departments of Radiology (N.H., A.S.Z.M., T.R.Y., J.d.A.B.A.F., P.P., L.M.d.O.C., G.G.C.), Surgery (J.S.N., E.A.d.F., P.C.), and Interventional Radiology (F.C.C.), Hospital Sírio-Libanês, Rua Dona Adma Jafet 91, São Paulo, SP 01308-050, Brazil; and Department of Radiology, University of São Paulo, São Paulo, Brazil (N.H., J.V.H., J.d.A.B.A.F., F.C.C., G.G.C.)
| | - Tássia Regina Yamanari
- From the Departments of Radiology (N.H., A.S.Z.M., T.R.Y., J.d.A.B.A.F., P.P., L.M.d.O.C., G.G.C.), Surgery (J.S.N., E.A.d.F., P.C.), and Interventional Radiology (F.C.C.), Hospital Sírio-Libanês, Rua Dona Adma Jafet 91, São Paulo, SP 01308-050, Brazil; and Department of Radiology, University of São Paulo, São Paulo, Brazil (N.H., J.V.H., J.d.A.B.A.F., F.C.C., G.G.C.)
| | - Jose de Arimateia Batista Araújo-Filho
- From the Departments of Radiology (N.H., A.S.Z.M., T.R.Y., J.d.A.B.A.F., P.P., L.M.d.O.C., G.G.C.), Surgery (J.S.N., E.A.d.F., P.C.), and Interventional Radiology (F.C.C.), Hospital Sírio-Libanês, Rua Dona Adma Jafet 91, São Paulo, SP 01308-050, Brazil; and Department of Radiology, University of São Paulo, São Paulo, Brazil (N.H., J.V.H., J.d.A.B.A.F., F.C.C., G.G.C.)
| | - Pedro Panizza
- From the Departments of Radiology (N.H., A.S.Z.M., T.R.Y., J.d.A.B.A.F., P.P., L.M.d.O.C., G.G.C.), Surgery (J.S.N., E.A.d.F., P.C.), and Interventional Radiology (F.C.C.), Hospital Sírio-Libanês, Rua Dona Adma Jafet 91, São Paulo, SP 01308-050, Brazil; and Department of Radiology, University of São Paulo, São Paulo, Brazil (N.H., J.V.H., J.d.A.B.A.F., F.C.C., G.G.C.)
| | - Joao Seda-Neto
- From the Departments of Radiology (N.H., A.S.Z.M., T.R.Y., J.d.A.B.A.F., P.P., L.M.d.O.C., G.G.C.), Surgery (J.S.N., E.A.d.F., P.C.), and Interventional Radiology (F.C.C.), Hospital Sírio-Libanês, Rua Dona Adma Jafet 91, São Paulo, SP 01308-050, Brazil; and Department of Radiology, University of São Paulo, São Paulo, Brazil (N.H., J.V.H., J.d.A.B.A.F., F.C.C., G.G.C.)
| | - Eduardo Antunes da Fonseca
- From the Departments of Radiology (N.H., A.S.Z.M., T.R.Y., J.d.A.B.A.F., P.P., L.M.d.O.C., G.G.C.), Surgery (J.S.N., E.A.d.F., P.C.), and Interventional Radiology (F.C.C.), Hospital Sírio-Libanês, Rua Dona Adma Jafet 91, São Paulo, SP 01308-050, Brazil; and Department of Radiology, University of São Paulo, São Paulo, Brazil (N.H., J.V.H., J.d.A.B.A.F., F.C.C., G.G.C.)
| | - Francisco Cesar Carnevale
- From the Departments of Radiology (N.H., A.S.Z.M., T.R.Y., J.d.A.B.A.F., P.P., L.M.d.O.C., G.G.C.), Surgery (J.S.N., E.A.d.F., P.C.), and Interventional Radiology (F.C.C.), Hospital Sírio-Libanês, Rua Dona Adma Jafet 91, São Paulo, SP 01308-050, Brazil; and Department of Radiology, University of São Paulo, São Paulo, Brazil (N.H., J.V.H., J.d.A.B.A.F., F.C.C., G.G.C.)
| | - Luciana Mendes de Oliveira Cerri
- From the Departments of Radiology (N.H., A.S.Z.M., T.R.Y., J.d.A.B.A.F., P.P., L.M.d.O.C., G.G.C.), Surgery (J.S.N., E.A.d.F., P.C.), and Interventional Radiology (F.C.C.), Hospital Sírio-Libanês, Rua Dona Adma Jafet 91, São Paulo, SP 01308-050, Brazil; and Department of Radiology, University of São Paulo, São Paulo, Brazil (N.H., J.V.H., J.d.A.B.A.F., F.C.C., G.G.C.)
| | - Paulo Chapchap
- From the Departments of Radiology (N.H., A.S.Z.M., T.R.Y., J.d.A.B.A.F., P.P., L.M.d.O.C., G.G.C.), Surgery (J.S.N., E.A.d.F., P.C.), and Interventional Radiology (F.C.C.), Hospital Sírio-Libanês, Rua Dona Adma Jafet 91, São Paulo, SP 01308-050, Brazil; and Department of Radiology, University of São Paulo, São Paulo, Brazil (N.H., J.V.H., J.d.A.B.A.F., F.C.C., G.G.C.)
| | - Giovanni Guido Cerri
- From the Departments of Radiology (N.H., A.S.Z.M., T.R.Y., J.d.A.B.A.F., P.P., L.M.d.O.C., G.G.C.), Surgery (J.S.N., E.A.d.F., P.C.), and Interventional Radiology (F.C.C.), Hospital Sírio-Libanês, Rua Dona Adma Jafet 91, São Paulo, SP 01308-050, Brazil; and Department of Radiology, University of São Paulo, São Paulo, Brazil (N.H., J.V.H., J.d.A.B.A.F., F.C.C., G.G.C.)
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39
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Tadros MY, Louka AL. Postoperative imaging of living donor liver transplantation complications. THE EGYPTIAN JOURNAL OF RADIOLOGY AND NUCLEAR MEDICINE 2018. [DOI: 10.1016/j.ejrnm.2017.10.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022] Open
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Horvat N, Nikolovski I, Long N, Gerst S, Zheng J, Pak LM, Simpson A, Zheng J, Capanu M, Jarnagin WR, Mannelli L, Do RKG. Imaging features of hepatocellular carcinoma compared to intrahepatic cholangiocarcinoma and combined tumor on MRI using liver imaging and data system (LI-RADS) version 2014. Abdom Radiol (NY) 2018; 43:169-178. [PMID: 28765978 DOI: 10.1007/s00261-017-1261-x] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
PURPOSE To evaluate the prevalence of major and ancillary imaging features from liver imaging reporting and data systems (LI-RADS) version 2014 and their interreader agreement when comparing hepatocellular carcinoma (HCC) to intrahepatic cholangiocarcinoma (ICC) and combined tumor (cHCC-CC). METHODS The Institutional Review Board approved this HIPAA-compliant retrospective study and waived the requirement for patients' informed consent. Patients with resected HCC (n = 51), ICC (n = 40), and cHCC-CC (n = 11) and available pre-operative contrast-enhanced MRI were included from 2000 to 2015. Imaging features and final LI-RADS category were evaluated by four radiologists. Imaging features were compared by Fisher's exact test and interreader agreements were assessed by κ statistics. RESULTS None of the features were unique to either HCC or non-HCC. Imaging features that were significantly more common among HCC compared to ICC and cHCC-CC included washout (76%-78% vs. 10%-35%, p < 0.001), capsule (55%-71% vs. 16%-49%, p < 0.05), and intralesional fat (27%-52% vs. 2%-12%, p < 0.002). Features that were more common among ICC and cHCC-CC included peripheral arterial phase hyperenhancement (40%-64% vs. 10%-14%, p < 0.001) and progressive central enhancement (65%-82% vs. 14%-25%, p < 0.001). The interreader agreement was moderate for each of these imaging features (κ = 0.41-0.55). Moderate agreement was also achieved in the assignment of LR-M (κ = 0.53), with an overall sensitivity and specificity for non-HCC malignancy of 86.3% and 78.4%, respectively. CONCLUSION HCC and non-HCC show significant differences in the prevalence of imaging features defined by LI-RADS, and are identified by radiologists with moderate interreader agreement. Using LI-RADS, radiologists also achieved moderate interreader agreement in the assignment of the LR-M category.
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Affiliation(s)
- Natally Horvat
- Department of Radiology, Memorial Sloan Kettering Cancer Center, 1275 York Avenue, New York, NY, 10065, USA
- Department of Radiology, Hospital Sírio-Libanês, Sao Paulo, Brazil
| | - Ines Nikolovski
- Department of Radiology, Memorial Sloan Kettering Cancer Center, 1275 York Avenue, New York, NY, 10065, USA
| | - Niamh Long
- Department of Radiology, Memorial Sloan Kettering Cancer Center, 1275 York Avenue, New York, NY, 10065, USA
| | - Scott Gerst
- Department of Radiology, Memorial Sloan Kettering Cancer Center, 1275 York Avenue, New York, NY, 10065, USA
| | - Jian Zheng
- Department of Surgery, Memorial Sloan Kettering Cancer Center, New York, NY, USA
| | - Linda Ma Pak
- Department of Surgery, Memorial Sloan Kettering Cancer Center, New York, NY, USA
| | - Amber Simpson
- Department of Surgery, Memorial Sloan Kettering Cancer Center, New York, NY, USA
| | - Junting Zheng
- Department of Epidemiology and Biostatistics, Memorial Sloan Kettering Cancer Cencer, New York, NY, USA
| | - Marinela Capanu
- Department of Epidemiology and Biostatistics, Memorial Sloan Kettering Cancer Cencer, New York, NY, USA
| | - William R Jarnagin
- Department of Surgery, Memorial Sloan Kettering Cancer Center, New York, NY, USA
| | - Lorenzo Mannelli
- Department of Radiology, Memorial Sloan Kettering Cancer Center, 1275 York Avenue, New York, NY, 10065, USA
| | - Richard Kinh Gian Do
- Department of Radiology, Memorial Sloan Kettering Cancer Center, 1275 York Avenue, New York, NY, 10065, USA.
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41
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Sugi MD, Albadawi H, Knuttinen G, Naidu SG, Mathur AK, Moss AA, Oklu R. Transplant artery thrombosis and outcomes. Cardiovasc Diagn Ther 2017; 7:S219-S227. [PMID: 29399525 DOI: 10.21037/cdt.2017.10.13] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Post-transplantation allograft arterial thrombosis is a well-recognized complication associated with solid organ transplantation. Much of the literature is centered on liver and kidney transplantation, which will therefore serve as the principle basis for this review, with a brief discussion on pancreas transplantation and associated arterial complications. The number of solid organ transplants has been steadily increasing over the past decade in parallel with growing demand for organs and expansion of the transplantation criteria for both donors and recipients. This increase has been accompanied by a number of innovative medical advances and surgical techniques, as well as improved imaging that has allowed for thoughtful exploration of vascular anatomic variants and the possibilities for transplant with which they are associated. It has also been accompanied by a growing field of behavioral research, as potential recipients must weigh the risk of accepting certain organs based on perceived outcomes that may differ according to the quality of the underlying organ. Improvements in imaging technology have brought greater sensitivity to detecting arterial complications in post-operative surveillance examinations and have allowed for further development of tailored endovascular and surgical interventions for transplant-associated vascular complications. This review will focus on post-transplantation solid organ allograft artery thrombosis, including discussion of risk factors, diagnostic imaging, natural history, and therapeutic options.
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Affiliation(s)
- Mark D Sugi
- Department of Radiology, Mayo Clinic Hospital, Phoenix, AZ, USA
| | - Hassan Albadawi
- Division of Vascular and Interventional Radiology, Mayo Clinic Hospital, Phoenix, AZ, USA
| | - Grace Knuttinen
- Division of Vascular and Interventional Radiology, Mayo Clinic Hospital, Phoenix, AZ, USA
| | - Sailendra G Naidu
- Division of Vascular and Interventional Radiology, Mayo Clinic Hospital, Phoenix, AZ, USA
| | - Amit K Mathur
- Division of Transplant Surgery, Mayo Clinic Hospital, Phoenix, AZ, USA
| | - Adyr A Moss
- Division of Transplant Surgery, Mayo Clinic Hospital, Phoenix, AZ, USA
| | - Rahmi Oklu
- Division of Vascular and Interventional Radiology, Mayo Clinic Hospital, Phoenix, AZ, USA
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Matesan M, Bermo M, Cruite I, Shih CH, Elojeimy S, Behnia F, Lewis D, Vesselle H. Biliary Leak in the Postsurgical Abdomen: A Primer to HIDA Scan Interpretation. Semin Nucl Med 2017; 47:618-629. [DOI: 10.1053/j.semnuclmed.2017.06.002] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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43
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Bali M, Pezzullo M, Pace E, Morone M. Benign biliary diseases. Eur J Radiol 2017; 93:217-228. [DOI: 10.1016/j.ejrad.2017.05.035] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2017] [Revised: 05/23/2017] [Accepted: 05/24/2017] [Indexed: 02/07/2023]
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44
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Sannananja B, Seyal AR, Baheti AD, Kim S, Lall C, Bhargava P. Tricky Findings in Liver Transplant Imaging: A Review of Pitfalls With Solutions. Curr Probl Diagn Radiol 2017; 47:179-188. [PMID: 28688531 DOI: 10.1067/j.cpradiol.2017.05.009] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Orthotopic liver transplantation is the preferred treatment for end-stage liver disease. Imaging plays an important role in the follow-up of transplant recipients by identifying a variety of complications. Posttransplant liver imaging can be challenging with altered vascular and nonvascular postoperative findings closely mimicking pathologies. A thorough knowledge of these common imaging findings in a posttransplant liver is essential for the radiologist to avoid erroneous diagnoses and unnecessary workup. We focus on such imaging findings and provide tips to avoid misinterpretation.
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Affiliation(s)
- Bhagya Sannananja
- Department of Radiology, University of Washington School of Medicine, Seattle, WA
| | - Adeel R Seyal
- Department of Radiology, Northwestern University, Chicago, IL
| | - Akshay D Baheti
- Department of Radiology, Tata Memorial Centre, Mumbai, Maharashtra, India
| | - Sooah Kim
- Department of Radiology, University of Washington School of Medicine, Seattle, WA
| | - Chandana Lall
- Department of Radiology, University of California, Orange, CA
| | - Puneet Bhargava
- Department of Radiology, University of Washington School of Medicine, Seattle, WA.
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45
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Hsieh CE, Chou CT, Lin CC, Lin KH, Lin PY, Lin HC, Ko CJ, Chang YY, Wang SH, Chen YL. Hemodynamic Changes Are Predictive of Coagulopathic Hemorrhage After Living Donor Liver Transplant. EXP CLIN TRANSPLANT 2017; 15:664-668. [PMID: 28585915 DOI: 10.6002/ect.2016.0206] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
OBJECTIVES Our goal was to evaluate the predictors of coagulopathic hemorrhage after living-donor liver transplant. MATERIALS AND METHODS We retrospectively evaluated 161 patients who had undergone living-donor liver transplant from July 2005 to April 2014 at a single medical institution. Of these patients, 32 developed hemorrhage after transplant. Patients were separated into those with coagulopathy-related hemorrhage (n=15) or noncoagulopathy-related hemorrhage (n=17) based on the results of computed tomography images. Predictors of hemorrhage after living-donor liver transplant evaluated in this study included preoperative, perioperative, and posttransplant factors and hemodynamic status. RESULTS Patients who developed coagulopathy-related hemorrhage had significantly lower pretransplant platelet counts (P = .040), a longer cold-ischemia time (P = .045), more blood loss (P = .040), and earlier onset of hemorrhage (P = .048) than patients who had noncoagulopathy-related hemorrhage after transplant. Results of the generalized estimating equation analysis showed that heart rate and central venous pressure differed significantly between the 2 groups of patients. Heart rates increased significantly during hemorrhage (P < .010). Central venous pressure was higher in the coagulopathic group (P = .005) than in the noncoagulopathic group. CONCLUSIONS Lower pretransplant platelet counts, longer cold ischemia time, more blood loss, earlier onset of hemorrhage, and higher central venous pressure level are indicators of coagulopathic hemorrhage after living-donor liver transplant.
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Affiliation(s)
- Chia-En Hsieh
- From the Liver Transplantation of Nurse Practitioner, Department of Nursing, Changhua Christian Hospital, Changhua, Taiwan
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46
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Percutaneous Treatment of Iatrogenic and Traumatic Injury of the Biliary System. CURRENT TRAUMA REPORTS 2017. [DOI: 10.1007/s40719-017-0099-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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47
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Le TX, Hippe DS, McNeeley MF, Dighe MK, Dubinsky TJ, Chan SS. The Sonographic Stenosis Index: A New Specific Quantitative Measure of Transplant Hepatic Arterial Stenosis. JOURNAL OF ULTRASOUND IN MEDICINE : OFFICIAL JOURNAL OF THE AMERICAN INSTITUTE OF ULTRASOUND IN MEDICINE 2017; 36:809-819. [PMID: 28029703 DOI: 10.7863/ultra.16.01005] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/11/2016] [Accepted: 05/24/2016] [Indexed: 06/06/2023]
Abstract
OBJECTIVES This study evaluates the sensitivity and specificity of stenosis index (SI), which accounts for the entire spectral Doppler waveform, to detect significant transplant hepatic arterial stenosis. MATERIALS AND METHODS In this institutional review board-approved, HIPAA compliant study, we retrospectively analyzed 69 patients who had catheter angiography for suspected transplant hepatic arterial stenosis (THAS) between January 2006 and December 2010; all patients had Doppler ultrasound within 30 days before angiography. Patients with angiographic stenosis requiring intervention were considered positive for THAS. Stenosis index was calculated from each patient's spectral Doppler ultrasound images by obtaining the ratio of the area under the high-frequency signal to low-frequency signal in the spectral Doppler. Resistive index (RI) and pulsatility index (PI) were also calculated. Receiver operator curve analysis was performed and the area under the curve (AUC) was compared among the three metrics. RESULTS Forty-eight of 69 patients had THAS by angiography requiring intervention; 21patients had no angiographic evidence of THAS. SI was significantly different (P < .001) between patients with THAS (SI = 1.04 ± 0.20) and those without THAS (SI = 1.39 ± 0.30). Stenosis index had an AUC of 0.86 for detecting THAS, which was significantly higher than that from RI (AUC = 0.68, P = .038 for the comparison) and PI (AUC = 0.70, P = .029). For SI < 1.35, the sensitivity for THAS was 94% and specificity was 52%. For RI < 0.5, the sensitivity was 96% and the specificity was 29%. CONCLUSIONS Stenosis index is more accurate than the resistive index and the pulsatility index for detecting transplant hepatic artery stenosis.
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Affiliation(s)
- Thomas X Le
- University of Washington School of Medicine, Department of Radiology, Seattle, Washington, USA
- Olive View-UCLA Medical Center, Sylmar, California, USA
| | - Daniel S Hippe
- University of Washington School of Medicine, Department of Radiology, Seattle, Washington, USA
| | - Michael F McNeeley
- University of Washington School of Medicine, Department of Radiology, Seattle, Washington, USA
| | - Manjiri K Dighe
- University of Washington School of Medicine, Department of Radiology, Seattle, Washington, USA
| | - Theodore J Dubinsky
- University of Washington School of Medicine, Department of Radiology, Seattle, Washington, USA
| | - Sherwin S Chan
- University of Washington School of Medicine, Department of Radiology, Seattle, Washington, USA
- Children's Mercy Hospital, Kansas City, Missouri, USA
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48
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Siskind EJ, Vandermeer F, Siskind TR, Bruno DA, Sultan S, Alvarez-Casas J, Stafford A, Lane B, Lamattina JC, Barth RN, Hanish SI. Postoperative Elevated Resistive Indices Do Not Predict Hepatic Artery Thrombosis in Extended Criteria Donor Livers. Int J Angiol 2017; 26:238-240. [PMID: 29142490 DOI: 10.1055/s-0037-1598623] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Postoperative transplant liver ultrasounds were analyzed in standard criteria donor (SCD), extended criteria donor (ECD), and donation after cardiac death (DCD) liver allografts to determine if elevated resistive indices (RIs) are consistently present and if they are pathological. Postoperative transplant liver ultrasounds were reviewed from 115 consecutive patients. Hepatic arterial RIs were stratified based on the type of donor: DCD, macrosteatosis (>30%), or standard criteria. In all patients with elevated RI, subsequent ultrasounds were reviewed to demonstrate RI normalization. The mean RI for all 115 patients was 0.64, DCD was 0.67, macrosteatosis was 0.81, and SCD was 0.61 ( p = 0.033). The RI on subsequent liver ultrasounds for DCD and macrosteatosis normalized without any intervention. There were no incidences of early hepatic artery thrombosis (HAT) observed in the cohort. Hepatic arterial RI in ECDs and DCDs are elevated in the immediate postoperative period but are not predictive of HAT. It represents interparenchymal graft stiffness and overall graft edema rather than an impending technical complication. The results of our study do not support the routine use of anticoagulation or routine investigation with computed tomography angiography for elevated RIs as these findings are self-limiting and normalize over a short period of time. We hope that this information helps guide the clinical management of liver transplant patients from expanded criteria donors.
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Affiliation(s)
- Eric J Siskind
- Division of Transplantation, University of Maryland Medical Center, Baltimore, Maryland
| | - Fauzia Vandermeer
- Division of Transplantation, University of Maryland Medical Center, Baltimore, Maryland
| | - Tamar R Siskind
- Division of Transplantation, University of Maryland Medical Center, Baltimore, Maryland
| | - David A Bruno
- Division of Transplantation, University of Maryland Medical Center, Baltimore, Maryland
| | - Samuel Sultan
- Division of Transplantation, University of Maryland Medical Center, Baltimore, Maryland
| | - Josue Alvarez-Casas
- Division of Transplantation, University of Maryland Medical Center, Baltimore, Maryland
| | - Arielle Stafford
- Division of Transplantation, University of Maryland Medical Center, Baltimore, Maryland
| | - Barton Lane
- Division of Transplantation, University of Maryland Medical Center, Baltimore, Maryland
| | - John C Lamattina
- Division of Transplantation, University of Maryland Medical Center, Baltimore, Maryland
| | - Rolf N Barth
- Division of Transplantation, University of Maryland Medical Center, Baltimore, Maryland
| | - Steven I Hanish
- Division of Transplantation, University of Maryland Medical Center, Baltimore, Maryland
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LeBedis CA, Bates DDB, Soto JA. Iatrogenic, blunt, and penetrating trauma to the biliary tract. Abdom Radiol (NY) 2017; 42:28-45. [PMID: 27503381 DOI: 10.1007/s00261-016-0856-y] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
Iatrogenic and traumatic bile leaks are uncommon. However, given the overall increase in number of hepatobiliary surgeries and the paradigm shift toward nonoperative management of patients with liver trauma, they have become more prevalent in recent years. Imaging is essential to establishing early diagnosis and guiding treatment as the clinical signs and symptoms of bile leaks are nonspecific, and a delay in recognition of bile leaks portends a high morbidity and mortality rate. Findings suspicious for a bile leak at computed tomography or ultrasonography include free or contained peri- or intrahepatic low density fluid in the setting of recent trauma or hepatobiliary surgery. Hepatobiliary scintigraphy and magnetic resonance cholangiopancreatography (MRCP) with hepatobiliary contrast agents can be used to detect active or contained bile leak. MRCP with hepatobiliary contrast agents has the unique ability to reveal the exact location of bile leak, which often governs whether endoscopic management or surgical management is warranted. Percutaneous transhepatic cholangiography and fluoroscopy via an indwelling catheter that is placed either percutaneously or surgically are useful modalities to guide percutaneous transhepatic biliary drain placement which can provide biliary drainage and/or diversion in the setting of traumatic biliary injury. Surgical treatment of a bile duct injury with Roux-en-Y hepaticojejunostomy is warranted if definitive treatment cannot be accomplished through percutaneous or endoscopic means.
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50
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Role of MDCT in the detection of early abdominal complications after orthotopic liver transplantation. Clin Imaging 2016; 40:1200-1206. [DOI: 10.1016/j.clinimag.2016.08.018] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2016] [Revised: 08/04/2016] [Accepted: 08/22/2016] [Indexed: 12/19/2022]
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