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Li J, Tao HS, Chen D, Huang ZY, Zhang EL. Hepatic inflammatory pseudotumor-like follicular dendritic cell tumor with hepatic lymphoma history: A case report and literature review. Medicine (Baltimore) 2021; 100:e27392. [PMID: 34596165 PMCID: PMC8483863 DOI: 10.1097/md.0000000000027392] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/09/2021] [Accepted: 09/15/2021] [Indexed: 01/05/2023] Open
Abstract
RATIONALE Hepatic inflammatory pseudotumor (IPT)-like follicular dendritic cell (FDC) sarcoma is a very rare disease. Till now, only 19 cases were reported in the English literature. However, the coexistence of IPT-like sarcoma and non-Hodgkin lymphoma (NHL) in the same patient has never been reported. In this report, we presented a case of hepatic IPT-like FDC with hepatic NHL history of which both were successfully resected. PATIENT CONCERNS We reported a case of a 47-year-old male patient who presented with right upper abdominal discomfort. Nineteen years ago, he underwent liver resection of segment VII for hepatic NHL (B-cell lymphoma). He had a history of chronic hepatitis B virus infection. Serum alpha fetoprotein level was normal. However, imaging studies revealed a well-circumscribed, solid mass in the right hepatic lobe, he came back to the clinic because he was worried about a recurrence of the B-cell lymphoma. DIAGNOSES Based on the patient's past medical history and magnetic resonance imaging results, and he was diagnosed as hepatocellular carcinoma or hepatic NHL preoperatively. INTERVENTIONS Right hemi-hepatectomy was performed on this patient. OUTCOMES Histological report showed features of a mixture of chronic inflammatory cells and variable amounts of spindle cells. Also, immuno-histo-chemical studies demonstrated that all the tumor cells showed strong nuclear in situ labeling for EBV-encoded small RNAs and strongly positive stainings with CD21 and CD35. The patient tolerated the surgery well, recovered smoothly and he was discharged on postoperative day 7 (day 7). The patient is still disease free after a follow-up of over 50 months. CONCLUSIONS To our knowledge, this is the first report demonstrating hepatic IPT-like FDC sarcoma in a patient with primary hepatic NHL history. In regards to treatment, complete surgical resection should be performed and would acquire excellent long-term outcomes.
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Affiliation(s)
- Jiang Li
- Hepatic Surgery Center, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, PR China
- Department of Hepatobiliary Surgery, The First Affiliated Hospital, College of Medicine, Shihezi University, Shihezi, Xinjiang, PR China
| | - Hai-Su Tao
- Hepatic Surgery Center, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, PR China
| | - Dong Chen
- Department of Pathology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, PR China
| | - Zhi-Yong Huang
- Hepatic Surgery Center, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, PR China
| | - Er-Lei Zhang
- Hepatic Surgery Center, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, PR China
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2
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Elbanna KY, Kielar AZ. Computed Tomography Versus Magnetic Resonance Imaging for Hepatic Lesion Characterization/Diagnosis. Clin Liver Dis (Hoboken) 2021; 17:159-164. [PMID: 33868658 PMCID: PMC8043714 DOI: 10.1002/cld.1089] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/20/2020] [Revised: 12/07/2020] [Accepted: 01/03/2021] [Indexed: 02/04/2023] Open
Affiliation(s)
- Khaled Y. Elbanna
- Toronto Joint Department of Medical ImagingUniversity Health NetworkSinai Health System and Women’s College HospitalUniversity of TorontoTorontoONCanada
| | - Ania Z. Kielar
- Toronto Joint Department of Medical ImagingUniversity Health NetworkSinai Health System and Women’s College HospitalUniversity of TorontoTorontoONCanada,The University of OttawaOttawaCanada
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3
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Renzulli M, Brocchi S, Ierardi AM, Milandri M, Pettinari I, Lucidi V, Balacchi C, Muratori P, Marasco G, Vara G, Tovoli F, Granito A, Carrafiello G, Piscaglia F, Golfieri R. Imaging-based diagnosis of benign lesions and pseudolesions in the cirrhotic liver. Magn Reson Imaging 2021; 75:9-20. [PMID: 32926993 DOI: 10.1016/j.mri.2020.09.008] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2020] [Revised: 09/07/2020] [Accepted: 09/08/2020] [Indexed: 02/07/2023]
Abstract
Liver cirrhosis is a leading cause of death worldwide, with 1-year mortality rates of up to 57% in decompensated patients. Hepatocellular carcinoma (HCC) is the most common primary tumor in cirrhotic livers and the second leading cause of cancer-related mortality worldwide. Annually, up to 8% of patients with cirrhosis develop HCC. The diagnosis of HCC rarely requires histological confirmation: in fact, according to the most recent guidelines, the imaging features of HCC are almost always sufficient for a certain diagnosis. Thus, the role of the radiologist is pivotal because the accurate detection and characterization of focal liver lesions in patients with cirrhosis are essential in improving clinical outcomes. Despite recent technical innovations in liver imaging, several issues remain for radiologists regarding the differentiation of HCC from other hepatic lesions, particularly benign lesions and pseudolesions. It is important to avoid misdiagnosis of benign liver lesions as HCC (false-positive cases) because this diagnostic misinterpretation may lead to ineligibility of a patient for potentially curative treatments or inappropriate assignment of high priority scores to patients on waiting lists for liver transplantation. This review presents a pocket guide that could be useful for the radiologist in the diagnosis of benign lesions and pseudolesions in cirrhotic livers, highlighting the imaging features that help in making the correct diagnosis of macroregenerative nodules; siderotic nodules; arterioportal shunts; hemangiomas, including fast-filling hemangiomas, hemangiomas with pseudowashout, and sclerosed hemangiomas; confluent fibrosis; pseudomasses in chronic portal vein thrombosis; and focal fatty changes.
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Affiliation(s)
- Matteo Renzulli
- Department of Radiology, IRCCS Azienda Ospedaliero-Universitaria di Bologna, Via Albertoni 15, Bologna, Italy.
| | - Stefano Brocchi
- Department of Radiology, IRCCS Azienda Ospedaliero-Universitaria di Bologna, Via Albertoni 15, Bologna, Italy
| | - Anna Maria Ierardi
- Unit of Radiology, IRCCS Cà Granda, Ospedale Maggiore Policlinico, Milan, Italy
| | - Matteo Milandri
- Department of Radiology, IRCCS Azienda Ospedaliero-Universitaria di Bologna, Via Albertoni 15, Bologna, Italy
| | - Irene Pettinari
- Department of Radiology, IRCCS Azienda Ospedaliero-Universitaria di Bologna, Via Albertoni 15, Bologna, Italy
| | - Vincenzo Lucidi
- Department of Radiology, IRCCS Azienda Ospedaliero-Universitaria di Bologna, Via Albertoni 15, Bologna, Italy
| | - Caterina Balacchi
- Department of Radiology, IRCCS Azienda Ospedaliero-Universitaria di Bologna, Via Albertoni 15, Bologna, Italy
| | - Paolo Muratori
- Department of the Science for the quality of life (QUVI), University of Bologna, Bologna, Italy
| | - Giovanni Marasco
- Department of Medical and Surgical Sciences, University of Bologna, Bologna, Italy
| | - Giulio Vara
- Department of Radiology, IRCCS Azienda Ospedaliero-Universitaria di Bologna, Via Albertoni 15, Bologna, Italy
| | - Francesco Tovoli
- Unit of Internal Medicine, Department of Medical and Surgical Sciences, University of Bologna, Bologna, Italy
| | - Alessandro Granito
- Unit of Internal Medicine, Department of Medical and Surgical Sciences, University of Bologna, Bologna, Italy
| | | | - Fabio Piscaglia
- Unit of Internal Medicine, Department of Medical and Surgical Sciences, University of Bologna, Bologna, Italy
| | - Rita Golfieri
- Department of Radiology, IRCCS Azienda Ospedaliero-Universitaria di Bologna, Via Albertoni 15, Bologna, Italy
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4
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Tirosh A, Hamimi A, Faucz F, Aharon-Hananel G, Zavras PD, Bonella B, Auerbach A, Gillis D, Lyssikatos C, Belyavskaya E, Stratakis CA, Gharib AM. Liver findings in patients with Carney complex, germline PRKAR1A pathogenic variants, and link to cardiac myxomas. Endocr Relat Cancer 2020; 27:355-360. [PMID: 32302974 PMCID: PMC7486872 DOI: 10.1530/erc-19-0517] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/24/2020] [Accepted: 03/30/2020] [Indexed: 12/17/2022]
Abstract
This study aimed to evaluate liver involvement in patients with Carney complex (CNC) based on a large cohort and to analyze any germline PRKAR1A genotype-phenotype association of liver disease. The study included 83 patients with CNC, followed between 1995 and 2018 at a tertiary research center. We reviewed liver images, recorded types and number of lesions and analyzed per genotype: all patients were sequenced for the PRKAR1A gene. A total of 29/83 patients (24.0%) had liver radiological findings. Patients with liver lesion had a significantly higher rate of pathogenic variants detected in the PRKAR1A gene (72.4 vs 38.9%, P = 0.005, respectively). Patients with a pathogenic variant detected on germline PRKAR1A analysis had a higher risk for having a liver lesion compared with patients with wild-type (WT) PRKAR1A alleles (21/42 (50.0%) vs 8/41 (19.5%), respectively, P = 0.004). Among patients with liver lesions, those with a nonsense PRKAR1A pathogenic-variant had more liver lesions (7/7) than among those with other pathogenic-variant types (8/22, P = 0.001). In multivariable analysis, detection of liver lesion(s) was associated with an odds ratio of 5.2 for cardiac myxomas (95% CI 1.55-17.49, P = 0.008). In conclusion, patients with CNC, particularly with a PRKAR1A pathogenic variant, have a higher rate of liver lesions. Additionally, liver lesions are associated with a high risk for cardiac myxomas in this population.
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Affiliation(s)
- Amit Tirosh
- Section on Endocrinology and Genetics, Eunice Kennedy Shriver National Institute of Child Health and Human Development National Institutes of Health, Bethesda, Maryland, USA
- Neuroendocrine Tumors Service, The Chaim Sheba Medical Center, Tel HaShomer, and Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Ahmed Hamimi
- Biomedical and Metabolic Imaging Branch, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, Maryland, USA
| | - Fabio Faucz
- Section on Endocrinology and Genetics, Eunice Kennedy Shriver National Institute of Child Health and Human Development National Institutes of Health, Bethesda, Maryland, USA
| | - Genya Aharon-Hananel
- Neuroendocrine Tumors Service, The Chaim Sheba Medical Center, Tel HaShomer, and Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Phaedon D Zavras
- Infectious Disease Service, Department of Medicine, Memorial Sloan Kettering Cancer Center, New York, New York, USA
| | - Belen Bonella
- Hospital Italiano de Buenos Aires, Buenos Aires, Argentina
| | - Adi Auerbach
- Pediatric Endocrine Unit, Shaarei Zedek, Jerusalem, Israel
| | - David Gillis
- Department of Pediatrics and Pediatric Endocrine Unit, Hadassah-Hebrew University Medical Center, Jerusalem, Israel
| | - Charalampos Lyssikatos
- Section on Endocrinology and Genetics, Eunice Kennedy Shriver National Institute of Child Health and Human Development National Institutes of Health, Bethesda, Maryland, USA
| | - Elena Belyavskaya
- Section on Endocrinology and Genetics, Eunice Kennedy Shriver National Institute of Child Health and Human Development National Institutes of Health, Bethesda, Maryland, USA
| | - Constantine A Stratakis
- Section on Endocrinology and Genetics, Eunice Kennedy Shriver National Institute of Child Health and Human Development National Institutes of Health, Bethesda, Maryland, USA
| | - Ahmed M Gharib
- Biomedical and Metabolic Imaging Branch, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, Maryland, USA
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Retrospective Analysis of Contrast-enhanced Ultrasonography Effectiveness in Reducing Time to Diagnosis and Imaging-related Expenditures at a Single Large United States County Hospital. Ultrasound Q 2020; 35:99-102. [PMID: 30169489 DOI: 10.1097/ruq.0000000000000375] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Hepatic and renal lesions detected during ultrasound examinations frequently require subsequent contrast-enhanced computed tomography (CT) or magnetic resonance imaging (MRI) for characterization, delaying time to imaging diagnosis and increasing overall health care expenditures. Contrast-enhanced ultrasonography (CEUS) is a comparatively low-cost diagnostic tool that is underutilized in the evaluation of such indeterminate or suspicious hepatic and renal lesions. A retrospective chart review of CEUS examinations performed in our department demonstrated significantly shorter time to imaging diagnosis with CEUS compared to CT or MRI, largely due to the ability to perform the CEUS examination at the time of initial examination. For example mean time to completion for outpatient examinations was 5.2, 52.3, and 123.5 days for CEUS, CT, and MRI, respectively. The majority (78.4%) of CEUS examinations were completed the same day as the initial examination. Additionally, 66.7% of CEUS examinations were deemed diagnostic, abrogating further workup with CT or MRI in most cases. Annual imaging cost reduction of up to US $117,000 is anticipated in our institution based on projected reductions in follow-up CT and MRI examinations. These results indicate when CEUS was used as a first step to characterize both incidental lesions in patients without known risk factors for malignancy as well as suspicious lesions in patients with risk factors it can greatly reduce time to diagnosis and health care expenditures.
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Abstract
Recent advances in diagnostic imaging of the hepatobiliary system include MRI, computed tomography (CT), contrast-enhanced ultrasound, and ultrasound elastography. With the advent of multislice CT scanners, sedated examinations in veterinary patients are feasible, increasing the utility of this imaging modality. CT and MRI provide additional information for dogs and cats with hepatobiliary diseases due to lack of superimposition of structures, operator dependence, and through intravenous contrast administration. Advanced ultrasound methods can offer complementary information to standard ultrasound imaging. These newer imaging modalities assist clinicians by aiding diagnosis, prognostication, and surgical planning.
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Affiliation(s)
- Angela J Marolf
- Department of Environmental and Radiological Health Sciences, College of Veterinary Medicine and Biomedical Sciences, Colorado State University, 300 West Drake Road, Fort Collins, CO 80523-1620, USA.
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7
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Wu CH, Chiu NC, Yeh YC, Kuo Y, Yu SS, Weng CY, Liu CA, Chou YH, Chiou YY. Uncommon liver tumors: Case report and literature review. Medicine (Baltimore) 2016; 95:e4952. [PMID: 27684838 PMCID: PMC5265931 DOI: 10.1097/md.0000000000004952] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
BACKGROUND Beside hepatocellular carcinoma, metastasis, and cholangiocarcinoma, the imaging findings of other relatively uncommon hepatic lesions are less discussed in the literature. Imaging diagnosis of these lesions is a daily challenge. In this article, we review the imaging characteristics of these neoplasms. METHODS From January 2003 to December 2014, 4746 patients underwent liver biopsy or hepatic surgical resection in our hospital. We reviewed the pathological database retrospectively. Imaging of these lesions was reviewed. RESULTS Imaging findings of uncommon hepatic lesions vary. We discuss the typical imaging characteristics with literature review. Clinical and pathological correlations are also described. Primary hepatic lymphoma consists only of 1% of the extranodal non-Hodgkin lymphoma, and is defined as the one involving only the liver and perihepatic lymph nodes within 6 months after diagnosis. Combined hepatocellular and cholangiocarcinoma (cHCC-CC) shares some overlapping imaging characteristics with both HCC and cholangiocarcinoma because of being an admixture of them. Angiosarcoma is the most common hepatic mesenchymal tumor and is hypervascular in nature. Inflammatory pseudotumor is often heterogeneous on ultrasonography and with enhanced septations and rims in the portovenous phase after contrast medium. Angiomyolipoma (AML) typically presents with macroscopic fat components with low signal on fat-saturated magnetic resonance imaging (MRI) and presence of drainage vessels. Intraductal papillary neoplasm of the bile duct (IPNB) is thought of as a counterpart to the pancreatic intraductal papillary mucinous neoplasm. Most of the IPNBs secrete mucin and cause disproportional dilatation of the bile ducts. Mucinous cystic neoplasm (MCN) contains proteinaceous and colloidal components without ductal communication and characterizes with hyperintensity on T1-weighted imaging. Other extremely rare lesions, including epithelioid hemangioendothelioma and inflammatory pseudotumor-like follicular dendritic cell sarcoma, are also discussed. Hepatoblastoma and mesenchymal hamartoma, mostly in children, are also briefly reviewed as well. CONCLUSION It is important for radiologists to be familiar with the typical imaging features of the uncommon hepatic neoplasms. If imaging findings are not typical or diagnostic, further biopsy is required.
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Affiliation(s)
- Chia-Hung Wu
- Department of Radiology, Taipei Veterans General Hospital
- School of Medicine, National Yang-Ming University
| | - Nai-Chi Chiu
- Department of Radiology, Taipei Veterans General Hospital
- School of Medicine, National Yang-Ming University
| | - Yi-Chen Yeh
- School of Medicine, National Yang-Ming University
- Department of Pathology and Laboratory Medicine, Taipei Veterans General Hospital, Taipei, Taiwan
| | - Yu Kuo
- Department of Radiology, Taipei Veterans General Hospital
- School of Medicine, National Yang-Ming University
| | - Sz-Shian Yu
- Department of Radiology, Taipei Veterans General Hospital
- School of Medicine, National Yang-Ming University
| | - Ching-Yao Weng
- Department of Radiology, Taipei Veterans General Hospital
- School of Medicine, National Yang-Ming University
| | - Chien-An Liu
- Department of Radiology, Taipei Veterans General Hospital
- School of Medicine, National Yang-Ming University
| | - Yi-Hong Chou
- Department of Radiology, Taipei Veterans General Hospital
- School of Medicine, National Yang-Ming University
| | - Yi-You Chiou
- Department of Radiology, Taipei Veterans General Hospital
- School of Medicine, National Yang-Ming University
- Correspondence: Yi-You Chiou, Department of Radiology, Taipei Veterans General Hospital, No. 201, Sec. 2, Shih-Pai Rd, Beitou District, Taipei, 11217, Taiwan (e-mail: )
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8
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Marolf AJ. Computed Tomography and MRI of the Hepatobiliary System and Pancreas. Vet Clin North Am Small Anim Pract 2016; 46:481-97, vi. [PMID: 26838961 DOI: 10.1016/j.cvsm.2015.12.006] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
MRI and computed tomographic (CT) imaging are becoming more common in the diagnosis of hepatobiliary and pancreatic disorders in small animals. With the advent of multislice CT scanners, sedated examinations in veterinary patients are feasible increasing the use of this imaging modality. CT and MRI provide additional information for dogs and cats with hepatobiliary and pancreatic diseases because of lack of superimposition of structures, operator dependence, and through intravenous contrast administration. This added value provides more information for diagnosis, prognosis, and surgical planning.
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Affiliation(s)
- Angela J Marolf
- Department of Environmental and Radiological Health Sciences, College of Veterinary Medicine and Biomedical Sciences, Colorado State University, 300 West Drake Road, Fort Collins, CO 80523-1620, USA.
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9
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Kim TK, Lee E, Jang HJ. Imaging findings of mimickers of hepatocellular carcinoma. Clin Mol Hepatol 2015; 21:326-43. [PMID: 26770920 PMCID: PMC4712159 DOI: 10.3350/cmh.2015.21.4.326] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/13/2015] [Accepted: 08/15/2015] [Indexed: 12/27/2022] Open
Abstract
Radiological imaging plays a crucial role in the diagnosis of hepatocellular carcinoma (HCC) as the noninvasive diagnosis of HCC in high-risk patients by typical imaging findings alone is widely adopted in major practice guidelines for HCC. While imaging techniques have markedly improved in detecting small liver lesions, they often detect incidental benign liver lesions and non-hepatocellular malignancy that can be misdiagnosed as HCC. The most common mimicker of HCC in cirrhotic liver is nontumorous arterioportal shunts that are seen as focal hypervascular liver lesions on dynamic contrast-enhanced cross-sectional imaging. Rapidly enhancing hemangiomas can be easily misdiagnosed as HCC especially on MR imaging with liver-specific contrast agent. Focal inflammatory liver lesions mimic HCC by demonstrating arterial-phase hypervascularity and subsequent washout on dynamic contrast-enhanced imaging. It is important to recognize the suggestive imaging findings for intrahepatic cholangiocarcinoma (CC) as the management of CC is largely different from that of HCC. There are other benign mimickers of HCC such as angiomyolipomas and focal nodular hyperplasia-like nodules. Recognition of their typical imaging findings can reduce false-positive HCC diagnosis.
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Affiliation(s)
- Tae Kyoung Kim
- Department of Medical Imaging, Toronto General Hospital, University of Toronto, Toronto, ON, Canada
| | - Eunchae Lee
- Department of Radiology, Seoul National University Bundang Hospital, Seongnam, Korea
| | - Hyun-Jung Jang
- Department of Medical Imaging, Toronto General Hospital, University of Toronto, Toronto, ON, Canada
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10
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Activity-based cost analysis of contrast-enhanced ultrasonography (CEUS) related to the diagnostic impact in focal liver lesion characterisation. Insights Imaging 2015; 6:499-508. [PMID: 25953127 PMCID: PMC4519812 DOI: 10.1007/s13244-015-0402-4] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2014] [Revised: 02/18/2015] [Accepted: 02/19/2015] [Indexed: 12/17/2022] Open
Abstract
PURPOSE This study was done to assess the clinical-diagnostic impact and cost of contrast-enhanced ultrasound (CEUS) versus computed tomography (CT) and magnetic resonance (MR) imaging in the characterisation of focal liver lesions. MATERIALS AND METHODS CEUS with sulphur hexafluoride-filled microbubbles (SonoVue bolus 2.4 ml) was performed in 157 patients with 160 focal liver lesions identified by other diagnostic techniques. CEUS images were obtained during the arterial (15 to 35 s from contrast injection), portal venous (40 to 70 s) and late phase (up to 300 s from microbubble injection). Contrast-enhanced CT was performed with a 64-row multidetector CT. MRI was performed before and after administration of the liver-specific contrast agent gadobenate dimeglumine (Gd-BOPTA). A patient-by-patient activity-based cost analysis was performed. RESULTS CEUS led to a change in the diagnostic workup in 131/157 patients (83.4 %) and in the therapeutic workup in 93/157 patients (59.2 %). CEUS allowed for the final diagnosis to be established in 133/157 patients (84.7 %). The full cost of CEUS was lower than that of contrast-enhanced CT and MR imaging. CONCLUSIONS CEUS determined a change in the diagnostic and therapeutic workup in the characterisation of focal liver lesions and reduced the full costs of the diagnostic process. MAIN MESSAGES • CEUS allows a correct diagnosis in more than 80 % of focal liver lesions. • CEUS has a significant impact on the diagnosis of focal liver lesions. • CEUS examination of focal liver lesions reduces total costs. • Dynamic MR with hepato-specific contrast medium remains the reference standard for lesion characterisation. • CEUS is low-cost, versatile and accurate in the characterisation of focal liver lesions.
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11
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Segura Grau A, Valero López I, Díaz Rodríguez N, Segura Cabral JM. [Liver ultrasound: focal lesions and diffuse diseases]. Semergen 2014; 42:307-14. [PMID: 25523277 DOI: 10.1016/j.semerg.2014.10.012] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2014] [Revised: 07/20/2014] [Accepted: 10/20/2014] [Indexed: 12/25/2022]
Abstract
Liver ultrasound is frequently used as a first-line technique for the detection and characterization of the most common liver lesions, especially those incidentally found focal liver lesions, and for monitoring of chronic liver diseases. Ultrasound is not only used in the Bmode, but also with Doppler and, more recently, contrast-enhanced ultrasound. It is mainly used in the diagnosis of diffuse liver diseases, such as steatosis or cirrhosis. This article presents a practical approach for diagnosis workup, in which the different characteristics of the main focal liver lesions and diffuse liver diseases are reviewed.
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Affiliation(s)
- A Segura Grau
- Unidad de Ecografía San Francisco de Asís, Centro de Diagnóstico Ecográfico, Coordinadora del GTE en Madrid de Semergen, Madrid, España.
| | - I Valero López
- Centro de Salud Valleaguado. Centro de Diagnóstico Ecográfico. Miembro GTE en Madrid de Semergen, Madrid, España
| | | | - J M Segura Cabral
- Aparato Digestivo, Unidad de Ecografía San Francisco de Asís, Centro de Diagnóstico Ecográfico, Madrid, España
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12
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Kim SM, Heo SH, Kim JW, Lim HS, Shin SS, Jeong YY, Kang HK. Hepatic arterial phase on gadoxetic acid-enhanced liver MR imaging: a randomized comparison of 0.5 mL/s and 1 mL/s injection rates. Korean J Radiol 2014; 15:605-12. [PMID: 25246821 PMCID: PMC4170161 DOI: 10.3348/kjr.2014.15.5.605] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2014] [Accepted: 07/14/2014] [Indexed: 01/10/2023] Open
Abstract
Objective To compare gadoxetic acid injection rates of 0.5 mL/s and 1 mL/s for hepatic arterial-phase magnetic resonance (MR) imaging. Materials and Methods In this prospective study, 101 consecutive patients with suspected focal liver lesions were included and randomly divided into two groups. Each group underwent dynamic liver MR imaging using a 3.0-T scanner after an intravenous injection of gadoxetic acid at rates of either 0.5 mL/s (n = 50) or 1 mL/s (n = 51). Arterial phase images were analyzed after blinding the injection rates. The signal-to-noise ratios (SNRs) of the liver, aorta, portal vein, hepatic vein, spleen, and pancreas were measured. The contrast-to-noise ratios (CNRs) of the hepatocellular carcinomas (HCC) were calculated. Finally, two experienced radiologists were independently asked to identify, if any, HCCs in the liver on the images and score the image quality in terms of the presence of artifacts and the proper enhancement of the liver, aorta, portal vein, hepatic vein, hepatic artery, spleen, pancreas, and kidney. Results The SNRs were not significantly different between the groups (p = 0.233-0.965). The CNRs of the HCCs were not significantly different (p = 0.597). The sensitivity for HCC detection and the image quality scores were not significantly different between the two injection rates (p = 0.082-1.000). Conclusion Image quality and sensitivity for hepatic HCCs of arterial-phase gadoxetic acid-enhanced MR were not significantly improved by reducing the contrast injection rate to 0.5 mL/s compared with 1 mL/s.
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Affiliation(s)
- Sung Mo Kim
- Department of Radiology, Chonnam National University Hwasun Hospital, Hwasun 519-763, Korea
| | - Suk Hee Heo
- Department of Radiology, Chonnam National University Hwasun Hospital, Hwasun 519-763, Korea
| | - Jin Woong Kim
- Department of Radiology, Chonnam National University Hwasun Hospital, Hwasun 519-763, Korea
| | - Hyo Soon Lim
- Department of Radiology, Chonnam National University Hwasun Hospital, Hwasun 519-763, Korea
| | - Sang Soo Shin
- Department of Radiology, Chonnam National University Hospital, Gwangju 501-757, Korea
| | - Yong Yeon Jeong
- Department of Radiology, Chonnam National University Hwasun Hospital, Hwasun 519-763, Korea
| | - Heoung Keun Kang
- Department of Radiology, Chonnam National University Hwasun Hospital, Hwasun 519-763, Korea
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13
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Sangwaiya MJ, Sherman DIN, Lomas DJ, Shorvon PJ. Latest developments in the imaging of fibrotic liver disease. Acta Radiol 2014; 55:802-13. [PMID: 24226293 DOI: 10.1177/0284185113510159] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
According to the World Health Organization, liver cirrhosis accounted for 1.8% of all deaths in Europe, causing about 170,000 deaths per year. Approximately 29 million persons in the EU suffer from chronic liver disease and this trend is on the rise. Liver disease is the EU's fifth most common cause of death accounting for at least one in six deaths. Early detection and monitoring of fibrosis has the potential to direct management of these chronic liver diseases and avert morbidity and mortality. Although the available techniques are in their infancy and the very early stages of fibrosis are difficult to detect, there have been significant advances in imaging over the last decade that has resulted in the use of these new imaging techniques being introduced into the patient pathway. This review explores the accuracies of these imaging techniques, their role in the management of patients, and the potential for the future.
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Affiliation(s)
- Minal J Sangwaiya
- Central Middlesex Hospital, Northwest London Hospitals NHS Trust, Acton, London, UK
- Imperial College, South Kensington, London, UK
| | - David IN Sherman
- Central Middlesex Hospital, Northwest London Hospitals NHS Trust, Acton, London, UK
| | | | - Philip J Shorvon
- Central Middlesex Hospital, Northwest London Hospitals NHS Trust, Acton, London, UK
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de Sio I, Iadevaia MD, Vitale LM, Niosi M, Del Prete A, de Sio C, Romano L, Funaro A, Meucci R, Federico A, Loguercio C, Romano M. Optimized contrast-enhanced ultrasonography for characterization of focal liver lesions in cirrhosis: A single-center retrospective study. United European Gastroenterol J 2014; 2:279-87. [PMID: PMID: 25083285 PMCID: PMC4114116 DOI: 10.1177/2050640614538964] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/09/2014] [Accepted: 05/12/2014] [Indexed: 12/23/2022] Open
Abstract
BACKGROUND Hepatocellular carcinoma (HCC) is the leading cause of death amongst cirrhotic patients. Its diagnosis and discrimination from non-HCC malignant lesions in cirrhosis includes contrast enhanced computed tomography (CECT), contrast enhanced magnetic resonance imaging (CEMRI), or, in selected cases, liver biopsy. The role of contrast-enhanced ultrasonography (CEUS) is still controversial. AIMS To evaluate whether, by selecting an appropriate 'time to wash-out' cut-off value, CEUS capability of discriminating between HCC and non-HCC malignancies in cirrhotic patients may be enhanced. METHODS We enrolled 282 cirrhotic patients who underwent CEUS at our institute, from January 2008 to January 2012, for focal liver lesions (FLLs) detected at ultrasound (US). We used liver biopsy and subsequent histological evaluation as the gold standard for correct classification of FLLs. We calculated the area under receiver operator characteristic curves for CEUS to distinguish patients with HCC from those with non-HCC malignancies. The best 'time to wash-out' cut-off values were selected. RESULTS HISTOLOGICAL DIAGNOSIS OF FLLS WAS AS FOLLOWS: 34 benign lesions (i.e. 25 regenerative nodules and 9 dysplastic nodules) and 248 malignant lesions (223 well-to-moderately differentiated HCCs; 7 poorly-differentiated HCCs; 5 intrahepatic colangiocellular carcinomas (ICCs); 5 primary non-Hodgkin B-cell lymphomas (NHBLs); and 8 metastatic liver tumors). A time to wash-out > 55 s identified patients with HCC with the highest level of accuracy (92.7%). Similarly, a time to wash-out ≤ 55 s correctly identified the vast majority of the non-HCC malignancies (100% sensitivity, 98.2% specificity and diagnostic accuracy of 98.3%). CONCLUSIONS CEUS is an accurate and safe procedure for discriminating FLLs in cirrhotic patients, especially when a cut-off time to wash-out of 55 s is chosen as a reference value.
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Affiliation(s)
- Ilario de Sio
- Department of Clinical and Experimental Medicine 'Magrassi-Lanzara', Second University of Naples, Naples, Italy
| | - Maddalena D Iadevaia
- Department of Clinical and Experimental Medicine 'Magrassi-Lanzara', Second University of Naples, Naples, Italy
| | - Luigi M Vitale
- Department of Clinical and Experimental Medicine 'Magrassi-Lanzara', Second University of Naples, Naples, Italy
| | - Marco Niosi
- Department of Clinical and Experimental Medicine 'Magrassi-Lanzara', Second University of Naples, Naples, Italy
| | - Anna Del Prete
- Department of Clinical and Experimental Medicine 'Magrassi-Lanzara', Second University of Naples, Naples, Italy
| | - Chiara de Sio
- Department of Clinical and Experimental Medicine 'Magrassi-Lanzara', Second University of Naples, Naples, Italy
| | - Lorenzo Romano
- Department of Clinical and Experimental Medicine 'Magrassi-Lanzara', Second University of Naples, Naples, Italy
| | - Annalisa Funaro
- Department of Clinical and Experimental Medicine 'Magrassi-Lanzara', Second University of Naples, Naples, Italy
| | - Rosaria Meucci
- Department of Clinical and Experimental Medicine 'Magrassi-Lanzara', Second University of Naples, Naples, Italy
| | - Alessandro Federico
- Department of Clinical and Experimental Medicine 'Magrassi-Lanzara', Second University of Naples, Naples, Italy
| | - Carmelina Loguercio
- Department of Clinical and Experimental Medicine 'Magrassi-Lanzara', Second University of Naples, Naples, Italy
| | - Marco Romano
- Department of Clinical and Experimental Medicine 'Magrassi-Lanzara', Second University of Naples, Naples, Italy
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Schmid-Tannwald C, Oto A, Reiser MF, Zech CJ. Diffusion-weighted MRI of the abdomen: current value in clinical routine. J Magn Reson Imaging 2013; 37:35-47. [PMID: 23255414 DOI: 10.1002/jmri.23643] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2011] [Accepted: 02/17/2012] [Indexed: 02/01/2023] Open
Abstract
Magnetic resonance imaging (MRI) provides high tissue contrast without ionizing radiation exposure and unenhanced images are often diagnostic. Therefore, MRI is especially an attractive tool for patients with allergies for gadolinium-based contrast agents or renal failure. Technical advantages have led to the increasing use of diffusion-weighted (DW) MRI in abdominal imaging, which provides qualitative and quantitative information of tissue cellularity and the integrity of cellular membranes. This review article presents the current status of noncontrast MRI with the focus of DW-MRI. Technical background and clinical applications are explained and discussed.
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Jang JY, Kim MY, Jeong SW, Kim TY, Kim SU, Lee SH, Suk KT, Park SY, Woo HY, Kim SG, Heo J, Baik SK, Kim HS, Tak WY. Current consensus and guidelines of contrast enhanced ultrasound for the characterization of focal liver lesions. Clin Mol Hepatol 2013; 19:1-16. [PMID: 23593604 PMCID: PMC3622850 DOI: 10.3350/cmh.2013.19.1.1] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/04/2012] [Revised: 03/08/2012] [Accepted: 03/14/2012] [Indexed: 12/12/2022] Open
Abstract
The application of ultrasound contrast agents (UCAs) is considered essential when evaluating focal liver lesions (FLLs) using ultrasonography (US). Microbubble UCAs are easy to use and robust; their use poses no risk of nephrotoxicity and requires no ionizing radiation. The unique features of contrast enhanced US (CEUS) are not only noninvasiveness but also real-time assessing of liver perfusion throughout the vascular phases. The later feature has led to dramatic improvement in the diagnostic accuracy of US for detection and characterization of FLLs as well as the guidance to therapeutic procedures and evaluation of response to treatment. This article describes the current consensus and guidelines for the use of UCAs for the FLLs that are commonly encountered in US. After a brief description of the bases of different CEUS techniques, contrast-enhancement patterns of different types of benign and malignant FLLs and other clinical applications are described and discussed on the basis of our experience and the literature data.
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Affiliation(s)
- Jae Young Jang
- Institute for Digestive Research, Digestive Disease Center, Department of Internal Medicine, Soonchunhyang University College of Medicine, Seoul, Korea
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Schmid-Tannwald C, Herrmann K, Oto A, Panteleon A, Reiser M, Zech C. Optimization of the dynamic, Gd-EOB-DTPA-enhanced MRI of the liver: the effect of the injection rate. Acta Radiol 2012; 53:961-5. [PMID: 23024179 DOI: 10.1258/ar.2012.120186] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
BACKGROUND Tissue-specific gadolinium-based contrast agents such as Gd-BOPTA, Gd-EOB-DTPA are increasingly used for liver imaging. Despite the added value of the hepatobiliary phase a proper arterial phase is still critical, especially in patients with chronic liver diseases. So far, there are limited data in the literature about the effect of the injection speed of Gd-EOB-DTPA in liver and vessel enhancement. PURPOSE To evaluate the effect of injection rate on the enhancement of liver parenchyma and vasculature in Gd-EOB-DTPA-enhanced liver MRI. MATERIAL AND METHODS Eighty patients who underwent Gd-EOB-DTPA-enhanced liver MRI (1.5T multi-channel MR-system) were retrospectively evaluated. We used a Care Bolus technique with an injection rate of 2 mL/s in group 1 (n = 40) and a Care Bolus technique with an injection rate of 1 mL/s in group 2 (n = 40) to determine the start of the arterial-dominant phase. Signal intensities were measured in vascular structures and liver parenchyma. Signal-to-noise-ratio (SNR), SNR increase (SNRi), and percentage enhancement (PE) were calculated and compared by a students t-test. RESULTS The SNR, SNRi, and PE of the aorta in the arterial phase were significantly higher in group 2 in comparison to group 1 (P = 0.007, P = 0.0043, and P < 0.001, respectively). There were no significant differences concerning the SNR, SNRi, or PE of the portal vein and the normal liver parenchyma between both groups at all time points. CONCLUSION The study shows that a lower injection rate of 1 mL/s enables a higher enhancement in the aorta in the arterial phase compared with Gd-EOB-DTPA-enhanced MRI with the more commonly used injection rate of 2 mL/s.
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Affiliation(s)
| | - Karin Herrmann
- Ludwig-Maximilian-University, Institute for Clinical Radiology, Munich, Germany
| | - Aytekin Oto
- University of Chicago, Department of Radiology, Chicago, USA
| | - Alexandra Panteleon
- Ludwig-Maximilian-University, Institute for Clinical Radiology, Munich, Germany
| | - Maximilian Reiser
- Ludwig-Maximilian-University, Institute for Clinical Radiology, Munich, Germany
| | - Christoph Zech
- Ludwig-Maximilian-University, Institute for Clinical Radiology, Munich, Germany
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Fukushima K, Kanemoto H, Ohno K, Takahashi M, Nakashima K, Fujino Y, Uchida K, Fujiwara R, Nishimura R, Tsujimoto H. CT characteristics of primary hepatic mass lesions in dogs. Vet Radiol Ultrasound 2012; 53:252-7. [PMID: 22244075 DOI: 10.1111/j.1740-8261.2011.01917.x] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2011] [Accepted: 12/13/2011] [Indexed: 01/25/2023] Open
Abstract
Little information is available on the relationship between computed tomography (CT) imaging findings and the pathologic diagnosis of canine hepatic tumors. Our purpose was to clarify the characteristic features of CT findings in liver tumors in dogs. Data from 33 dogs with either a hepatocellular carcinoma, n = 14, hepatocellular adenoma, n = 14, or nodular hyperplasia, n = 5 were summarized from medical records. CT features for each histologic diagnosis were characterized and analyzed statistically. Common findings in hepatocellular carcinoma included central (79%, P = 0.0030) and marginal enhancement (93%, P = 0.00043) in the arterial phase, cyst-like lesions (93%), capsule formation (93%), and hypoattenuation in the portal (86%), and equilibrium phases (93%). Hepatic adenoma was characterized by a characteristic diffuse enhancement pattern during the arterial phase (57%, P = 0.013), which was also found in nodular hyperplasia (60%), but never in hepatocellular carcinoma. Nodular hyperplasia was less likely to have a capsule structure (20%, P = 0.0087). Mass size was significantly smaller in nodular hyperplasia than in hepatocellular carcinoma and hepatic adenoma (P = 0.0033 and 0.038, respectively). Hyperattenuation in the arterial and the portal phase i.e. contrast retention, was more frequent in hepatic adenoma than in the other groups (P = 0.037 and 0.037, respectively). Nodular hyperplasia was more frequently isoattenuating in the equilibrium phase (P = 0.043).
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Affiliation(s)
- Kenjiro Fukushima
- Department of Veterinary Internal Medicine, University of Tokyo, Tokyo, Japan
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Detection of hepatocellular carcinomas with near-infrared fluorescence imaging using indocyanine green: its usefulness and limitation. Int J Clin Oncol 2011; 18:232-41. [DOI: 10.1007/s10147-011-0367-3] [Citation(s) in RCA: 81] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2011] [Accepted: 12/12/2011] [Indexed: 11/26/2022]
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20
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Koh TS, Thng CH, Hartono S, Kwek JW, Khoo JBK, Miyazaki K, Collins DJ, Orton MR, Leach MO, Lewington V, Koh DM. Dynamic contrast-enhanced MRI of neuroendocrine hepatic metastases: A feasibility study using a dual-input two-compartment model. Magn Reson Med 2011; 65:250-60. [PMID: 20860001 DOI: 10.1002/mrm.22596] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Neuroendocrine hepatic metastases exhibit various contrast uptake enhancement patterns in dynamic contrast-enhanced MRI. Using a dual-input two-compartment distributed parameter model, we analyzed the dynamic contrast-enhanced MRI datasets of seven patient study cases with the aim to relate the tumor contrast uptake patterns to parameters of tumor microvasculature. Simulation studies were also performed to provide further insights into the effects of individual microcirculatory parameter on the tumor concentration-time curves. Although the tumor contrast uptake patterns can be influenced by many parameters, initial results indicate that hepatic blood flow and the ratio of fractional vascular volume to fractional interstitial volume may potentially distinguish between the patterns of neuroendocrine hepatic metastases.
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Affiliation(s)
- T S Koh
- Department of Oncologic Imaging, National Cancer Center, Singapore.
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Molins IG, Font JMF, Álvaro JC, Navarro JLL, Gil MF, Rodríguez CMF. Contrast-enhanced ultrasound in diagnosis and characterization of focal hepatic lesions. World J Radiol 2010; 2:455-62. [PMID: 21225000 PMCID: PMC3018553 DOI: 10.4329/wjr.v2.i12.455] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/15/2010] [Revised: 12/20/2010] [Accepted: 12/26/2010] [Indexed: 02/06/2023] Open
Abstract
The extensive use of imaging techniques in differential diagnosis of abdominal conditions and screening of hepatocellular carcinoma in patients with chronic hepatic diseases, has led to an important increase in identification of focal liver lesions. The development of contrast-enhanced ultrasound (CEUS) opens a new window in the diagnosis and follow-up of these lesions. This technique offers obvious advantages over the computed tomography and magnetic resonance, without a decrease in its sensitivity and specificity. The new second generation contrast agents, due to their intravascular distribution, allow a continuous evaluation of the enhancement pattern, which is crucial in characterization of liver lesions. The dual blood supply in the liver shows three different phases, namely arterial, portal and late phases. The enhancement during portal and late phases can give important information about the lesion’s behavior. Each liver lesion has a different enhancement pattern that makes possible an accurate approach to their diagnosis. The role of emerging techniques as a contrast-enhanced three-dimensional US is also discussed. In this article, the advantages, indications and technique employed during CEUS and the different enhancement patterns of most benign and malignant focal liver lesions are discussed.
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Abstract
Liver hydatidosis is the most common clinical presentation of cystic echinococcosis (CE). Ultrasonographic mass surveys have demonstrated the true prevalence, including the asymptomatic characteristic of the majority of cases, providing new insight into the natural history of the disease. This raises the question of whether to treat or not to treat these patients, due to the high and unsuspected prevalence of CE. The high rate of liver/lung frequencies of cyst localization, the autopsy findings, and the involution of cysts demonstrated in long time follow-up of asymptomatic carriers contribute to this discussion. The decision to treat an asymptomatic patient by surgery, albendazole, or puncture aspiration injection and reaspiration or to wait and watch, is based on conflicting reports in the literature, the lack of complications in untreated patients over time, and the spontaneous disappearance and involution of cysts. All these points contribute to difficulties of individual clinical decisions. The patients should be informed of the reasons and the risks of watchful/waiting without treatment, the possibility of complications, and the risks of the other options. As more information on the natural history of liver hydatidosis is acquired, selection of the best treatment will be come easier. Without this knowledge it would be very difficult to establish definitive rules of treatment. At present, it is possible to manage these patients over time and to wait for the best moment for treatment. Follow-up studies must be conducted to achieve this objective.
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Maniam S, Szklaruk J. Magnetic resonance imaging: Review of imaging techniques and overview of liver imaging. World J Radiol 2010; 2:309-22. [PMID: 21160685 PMCID: PMC2999331 DOI: 10.4329/wjr.v2.i8.309] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/20/2010] [Revised: 06/24/2010] [Accepted: 07/15/2010] [Indexed: 02/06/2023] Open
Abstract
Magnetic resonance imaging (MRI) of the liver is slowly transitioning from a problem solving imaging modality to a first line imaging modality for many diseases of the liver. The well established advantages of MRI over other cross sectional imaging modalities may be the basis for this transition. Technological advancements in MRI that focus on producing high quality images and fast imaging, increasing diagnostic accuracy and developing newer function-specific contrast agents are essential in ensuring that MRI succeeds as a first line imaging modality. Newer imaging techniques, such as parallel imaging, are widely utilized to shorten scanning time. Diffusion weighted echo planar imaging, an adaptation from neuroimaging, is fast becoming a routine part of the MRI liver protocol to improve lesion detection and characterization of focal liver lesions. Contrast enhanced dynamic T1 weighted imaging is crucial in complete evaluation of diseases and the merit of this dynamic imaging relies heavily on the appropriate timing of the contrast injection. Newer techniques that include fluoro-triggered contrast enhanced MRI, an adaptation from 3D MRA imaging, are utilized to achieve good bolus timing that will allow for optimum scanning. For accurate interpretation of liver diseases, good understanding of the newer imaging techniques and familiarity with typical imaging features of liver diseases are essential. In this review, MR sequences for a time efficient liver MRI protocol utilizing newer imaging techniques are discussed and an overview of imaging features of selected common focal and diffuse liver diseases are presented.
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Kweon S, Lee HJ, Hyung WJ, Suh J, Lim JS, Lim SJ. Liposomes Coloaded with Iopamidol/Lipiodol as a RES-Targeted Contrast Agent for Computed Tomography Imaging. Pharm Res 2010; 27:1408-15. [DOI: 10.1007/s11095-010-0135-5] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2010] [Accepted: 03/24/2010] [Indexed: 11/30/2022]
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