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Mohammed S, AbdAlla E, Elhag A, El-Mardi A. The prevalence of accessory renal arteries in sudanese population in Khartoum State: a cross-sectional CT study from 2017 to 2020. BMC Nephrol 2024; 25:135. [PMID: 38622526 PMCID: PMC11017523 DOI: 10.1186/s12882-024-03573-3] [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: 02/29/2024] [Accepted: 04/08/2024] [Indexed: 04/17/2024] Open
Abstract
BACKGROUND Renal artery variations are clinically significant due to their implications for surgical procedures and renal function. However, data on these variations in Sudanese populations are limited. This study aimed to determine the prevalence and characteristics of renal artery variations in a Sudanese population. METHODS A cross-sectional retrospective study was conducted in Khartoum state from October 2017 to October 2020. A total of 400 Sudanese participants who underwent abdominal CT scans were included. Data on demographic characteristics, kidney measurements, and renal vasculature were collected and analyzed using descriptive statistics and inferential tests. RESULTS The mean age of participants was 46.7 ± 18 years, with a nearly equal gender distribution. Overall, renal artery variations were present in 11% of participants, with accessory renal arteries observed in 6% of the study population. Among those with accessory vessels, 50% were on the right side, 29.2% on the left, and 20.8% bilateral, distributed across hilar 29.2%, lower polar 29.2%, and upper polar 41.7% regions. No significant associations were found between accessory renal arteries and age or gender (p-value > 0.05). However, participants with accessory renal arteries exhibited significantly narrower width 5.0 ± 1.4 than those with no with accessory renal arteries 5.8 ± 1.1 (p-value 0.002) Early dividing renal arteries were found in 5% of participants, with nearly half being bilateral. No significant associations were found between the presence of early dividing renal arteries and demographic or renal measurements (p-value > 0.05). CONCLUSION This study provides valuable insights into the prevalence and characteristics of renal artery variations in a Sudanese population. The findings contribute to our understanding of renal anatomy in this demographic and can inform clinical practice and surgical planning, particularly in renal transplantation and other renal procedures.
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Affiliation(s)
- Safaa Mohammed
- Nursing Department, Faculty of Medical Sciences and Nursing, Alrayan Colleges, Almadina, Saudi Arabia
| | - Eltayeb AbdAlla
- Faculty of Medicine, University of Khartoum, Khartoum, Sudan.
| | - Amal Elhag
- Assistant Professor of Human Anatomy, Faculty of Medicine and Surgery, Umm Al-Qura University, Makkah, Saudi Arabia
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Mehreen S, Rizwan Ahmed R, Qureshi R, Irfan N. Vascular Variations and Incidental Pathologies in Potential Living Renal Donors Using 160-Slice Multidetector Computed Tomography Angiography. Cureus 2023; 15:e41502. [PMID: 37551209 PMCID: PMC10404366 DOI: 10.7759/cureus.41502] [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] [Accepted: 07/06/2023] [Indexed: 08/09/2023] Open
Abstract
INTRODUCTION The aim of the study is to evaluate the vascular variations and incidental pathologies in potential living renal donors using 160-slice multidetector computed tomography (MDCT) angiography. METHODS This is an observational study conducted at the Department of Radiology from January 2017 to May 2022. In this study, we performed retrospective data analysis of 61 CT renal angiograms, totaling 122 kidneys of potential renal donors, using a Toshiba 160 slice MDCT scanner with a four-phase CT image acquisition protocol, performed for pre-transplant workup. All patients had normal renal functions. RESULTS Of our 61 patients, 34 (55.7%) were male and 27 (44.3%) were female, and their mean age was 31.2 ± 9.4 years. We have found 31 (50.8%) variations in the right renal arteries and 21 (34.4%) in the left renal arteries. Of these patients, 13 had bilateral renal arterial variations. The late confluence of the renal vein was found in 3.3% of males, multiple right renal veins in 7 (11.5%), and left renal veins in 2 (3.3%). By distributing the data according to gender, we noticed more diversity in the renal vessels of male patients. Left renal artery variations were more frequent in males (16, 76.2%) than in females (5, 23.8%), and they were statistically significant (p=0.02). Likewise, variations in the right renal arteries were also more frequently found in males (19, 61.3%) as compared to females (12, 38.7%). Right renal vein variations were more common in males (9, 81.8%) as compared to females (2, 18.2%) (p=0.05). CONCLUSION Frequent renal vascular variations and incidental pathologies in potential living donors were found by MDCT examination, and these vascular variations should be analyzed before renal transplant.
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Affiliation(s)
- Sehrish Mehreen
- Radiology, The Kidney Centre Post Graduate Training Institute (PGTI), Karachi, PAK
- Radiology, Memon Medical Institute Hospital, Karachi, PAK
| | - Raja Rizwan Ahmed
- Urology, The Kidney Centre Post Graduate Training Institute (PGTI), Karachi, PAK
| | - Ruqaya Qureshi
- Nephrology, The Kidney Centre Post Graduate Training Institute (PGTI), Karachi, PAK
| | - Nadia Irfan
- Radiology, The Kidney Centre Post Graduate Training Institute (PGTI), Karachi, PAK
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Kafarov ES, Miltykh I, Dmitriev AV, Zenin OK. Anatomical variability of kidney arterial vasculature based on zonal and segmental topography. Heliyon 2023; 9:e15315. [PMID: 37101622 PMCID: PMC10123188 DOI: 10.1016/j.heliyon.2023.e15315] [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: 12/16/2022] [Revised: 03/30/2023] [Accepted: 04/03/2023] [Indexed: 04/28/2023] Open
Abstract
Introduction To date, there is no unified approach to the lobar, zonal, and segmental structure of the kidney vasculature. There is no recognizable approach to define basic characteristics in regard to the lobes and segments identifying of the kidney. The branching of the renal artery has often been the subject of scientific research. This study aimed to analyze the arterial anatomy on the basis of zonal and segmental topography. Materials and methods This study is a prospective cadaver study on autopsy material using corrosion casting and CT imaging techniques. The arterial vasculature was visualized using corrosive casting. In this study, 116 vascular casts were included. We identified the number of arteries in the kidney hilum, their topography, branching variations of the renal artery, and local blood supply zones of renal masses considering second- and third-order renal artery branches. We used a micro-CT BRUKER SkyScan 1178, digital camera, Mimics-8.1, and R. Results This study has shown that RA divides into two or three zonal arteries, forming a two- or three-zonal vascular supply system. In the case of the two-zonal system, 54.3% of cases accounted for RA branching into ventral and dorsal arteries, whereas 15.5% of cases referred to superior polar and inferior polar zonal arteries. The three-zonal system implies 4 types of RA branching: 1) superior polar, ventral, and dorsal zonal branches (12.9%); 2) ventral, dorsal, and inferior polar zonal branches (9.5%); 3) two ventral and one dorsal zonal branches (5.2%), and 4) superior polar, central, and inferior polar zonal branches (2.5%). Conclusions The results of this research make us reconsider Grave's classification theory.
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Affiliation(s)
| | - Ilia Miltykh
- Penza State University, Penza, Russia
- Corresponding author. Department of Human Anatomy, Penza State University, 40 Krasnaya str., 440026 Penza, Russia.
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Hekimoglu A, Ergun O. Evaluation of renal vascular variations with computed tomography. AFRICAN JOURNAL OF UROLOGY 2022. [DOI: 10.1186/s12301-022-00290-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
Abstract
Background
It is important to know the renal vascular variations before renal surgeries and invasive procedures. The aim of this study is to evaluate the prevalence and types of variation of renal arteries and veins.
Methods
The abdominal CT images of 460 patients, taken between 2019 and 2021, were retrospectively analyzed in axial and coronal planes. The presence and number of accessory renal arteries and early branching in the main renal artery were evaluated. Then, bilateral renal vein variations were investigated. Finally, the compression of the left renal vein by different anatomical structures was evaluated.
Results
Of the 450 patients included in the study, the mean age was 53 years. No variations were detected in 378 renal arteries on the right side (84%) and 392 renal arteries on the left side (87.1%). The most common variation in renal arteries was an accessory inferior hilar artery in 7.5% and 6% rates on the right and left, respectively. An accessory inferior renal polar artery was observed at an overall rate of 1.3%. An accessory superior renal hilar artery was found at 3.3% and 2% rates on the left and the right, respectively. An accessory superior renal polar artery was found at an overall rate of 3.5%. Multiple variations in the renal arteries were observed at a rate of 6.4%. Early branching was observed at a rate of 4.9% on the right and 2.2% on the left. The presence of two and three right renal veins was observed at rates of 13.1% and 0.6%, respectively. Retroaortic and circumaortic left renal veins were found at 3.5% and 4.4% rates, respectively. The compression on the anterior and posterior left renal veins was observed at 4.6% and 0.9% rates, respectively.
Conclusion
Considering that variations in renal arteries and veins are too many and of different types to underestimate, a CT examination for the renal vascular anatomy before and at the planning phase of renal surgery or interventional procedures will be of great benefit to avoid potential complications.
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GÜNDOĞDU H, AYDIN AKSU S, KARA M. Comparison of low-dose contrast computed tomography angiography findings with surgical results in living kidney donors. JOURNAL OF HEALTH SCIENCES AND MEDICINE 2022. [DOI: 10.32322/jhsm.1014834] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
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Galhotra R, Dabria N, Galhotra A, Galhotra A, Sharma I, Kakkar C, Gupta K, Saggar K. Analysis of anatomical variations of the main arteries branching from the abdominal aorta by multidetector computed tomography: A prospective study of 500 patients in a tertiary center. J ANAT SOC INDIA 2022. [DOI: 10.4103/jasi.jasi_137_21] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Gebremickael A, Afework M, Wondmagegn H, Bekele M. Renal vascular variations among kidney donors presented at the national kidney transplantation center, Addis Ababa, Ethiopia. TRANSLATIONAL RESEARCH IN ANATOMY 2021. [DOI: 10.1016/j.tria.2021.100145] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022] Open
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Li X, Xia F, Chen L, Zhang X, Mo C, Shen W. One-stop preoperative assessment of renal vessels for living donors with 3.0 T non-contrast-enhanced magnetic resonance angiography: compared with computerized tomography angiography and surgical results. Br J Radiol 2021; 94:20210589. [PMID: 34558306 DOI: 10.1259/bjr.20210589] [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] Open
Abstract
OBJECTIVE The study was to investigate the feasibility and accuracy of assessment for living renal donors before transplantation by using 3.0 T non-contrast-enhanced magnetic resonance angiography (NCE-MRA). METHODS 30 renal donors were investigated and underwent computed tomography angiography (CTA) and 3.0 T NCE-MRA before nephrectomy. Two radiologists independently assessed arterial and venous anatomy and potential kidney lesions. The image quality score, signal-to-noise ratio (SNR), contrast-to-noise ratio (CNR), diameters and lengths of renal arteries and veins were compared between CTA and NCE-MRA. Imaging findings were compared with the surgical results served as reference standard. Agreement was assessed using κ test. The Wilcoxon test and paired sample t test were used for statistically significant differences. RESULTS The results of image quality score for renal arteries and veins were highly consistent between the two radiologists in NCE-MRA (p < 0.001). There was no significant difference in the scores of renal arterial and venous branches between NCE-MRA and CTA (p > 0.05). The SNR and CNR of renal vessels were higher than CTA (p < 0.001). There were no statistically significant differences in the length of renal vessels measured by the two methods (p > 0.05), and the diameter was smaller than that of CTA (p < 0.05). The detection of normal renal arteries and early branches by both examination techniques was consistent with intraoperative findings. Both methods showed good consistency between the anatomical variation of renal vein and the intraoperative diagnosis (p < 0.001). CONCLUSION 3.0 T NCE-MRA can be used for evaluation of main renal arteries and veins with high accuracy for anatomy and variation classification, and can be used for pre-operative vascular evaluation of living donor kidney transplantation. ADVANCES IN KNOWLEDGE 3.0 T NCE-MRA can be used for evaluation of main renal arteries and veins with high accuracy for anatomy and variation classification, and can be used for pre-operative vascular evaluation of living donor kidney transplantation.
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Affiliation(s)
- Xiaotian Li
- School of Medicine, Nankai University, Tianjin, China
| | - Fangjie Xia
- Department of Radiology, Tianjin First Center Hospital, Tianjin Medical University, Tianjin, China
| | - Lihua Chen
- Department of Radiology, Tianjin First Center Hospital, School of Medicine, Nankai University, Tianjin, China
| | - Xiaodong Zhang
- Department of Radiology, Tianjin First Center Hospital, School of Medicine, Nankai University, Tianjin, China
| | - Chunbai Mo
- Department of Kidney Transplantation, Tianjin First Center Hospital, School of Medicine, Nankai University, Tianjin, China
| | - Wen Shen
- Department of Radiology, Tianjin First Center Hospital, School of Medicine, Nankai University, Tianjin, China
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O'Kelly F, Lorenzo AJ, Zubi F, De Cotiis K, Farhat WA, Koyle MA. The impact of multiple donor renal arteries on perioperative complications and allograft survival in paediatric renal transplantation. J Pediatr Urol 2021; 17:541.e1-541.e11. [PMID: 33883096 DOI: 10.1016/j.jpurol.2021.03.016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/10/2020] [Revised: 01/21/2021] [Accepted: 03/18/2021] [Indexed: 11/29/2022]
Abstract
BACKGROUND The impact of using allografts with multiple renal arteries in paediatric kidney transplantation has not been clearly established. The aim of this study was to determine whether kidney grafts with multiple arteries pose any adverse effects upon perioperative surgical outcomes, and graft survival up to 12 months post-transplant. OBJECTIVE The objective of this study was to perform a comparative analysis of a minimum of 12-month graft survival and transplant renal function in paediatric renal transplant recipients receiving single versus multiple donor arteries, and to assess perioperative and early post-operative surgical outcomes. STUDY DESIGN A retrospective divisional chart review of 379 transplants performed (2000-2018), of which 90 (23.7%) contained multiple donor arteries. The number of arteries of the graft, donor type, vascular reconstruction technique, occurrence of urological and vascular complications, estimated GFR and graft survival up to 12 months post-transplantation, graft loss and mortality were analysed. Comparisons in baseline characteristics and outcome measures were made between both groups. RESULTS No significant differences were found in age (p = 0.42), BMI (p = 0.39), estimated intraoperative blood loss (p = 0.14), overall (p = 0.63) or warm ischaemic time (p = 0.37). 51.3% patients with multiple donor arteries underwent an ex vivo reconstruction. There were no differences in the site of arterial anastomosis (aorta, external iliac, internal iliac), or anastomotic type (end-side; end-end). Whilst there was a significantly higher post-operative lymphocoele rate in the multiple vessel cohort (p = 0.024), there was no increase in post-transplant urine leaks, rejection episodes, graft loss (1.1% multiple vs 2.1% single), perioperative complications (p = 0.68), or estimated GFR at 1 month (p = 0.9) or at 1 year (p = 0.67). DISCUSSION We demonstrated in this study that there was no significant difference in postoperative complications up to 3 months, eGFR and renal function up to 1 year, and graft survival up to 4 years post transplantation irrespective of allograft type or reconstruction technique. There was however, a higher rate of lymphocoeles in the multiple artery cohort. The results seen here broadly mirror trends seen in adult studies, however, there is little data available from paediatric series. CONCLUSION Our study demonstrates that multiple renal artery allografts - previously been considered to carry a high complication risk - can be safely used for paediatric renal transplantation with equivalent perioperative complications and graft outcomes to single artery allografts.
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Affiliation(s)
- F O'Kelly
- Division of Pediatric Urology, Hospital for Sick Children, Toronto, Canada; Division of Paediatric Urology, Beacon Hospital, University College, Dublin, Ireland.
| | - A J Lorenzo
- Division of Pediatric Urology, Hospital for Sick Children, Toronto, Canada
| | - F Zubi
- Division of Pediatric Urology, Hospital for Sick Children, Toronto, Canada
| | - K De Cotiis
- Division of Pediatric Urology, Hospital for Sick Children, Toronto, Canada; Division of Pediatric Urology, Neymours/duPont Childrens Hospital, Delaware, USA
| | - W A Farhat
- Division of Pediatric Urology, Hospital for Sick Children, Toronto, Canada; Division of Pediatric Urology, American Family Childrens Hospital, Wisconsin, USA
| | - M A Koyle
- Division of Pediatric Urology, Hospital for Sick Children, Toronto, Canada
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A Unique Case of Incomplete Bifid Ureter and Associated Arterial Variations. Case Rep Urol 2021; 2021:6655813. [PMID: 33489410 PMCID: PMC7801057 DOI: 10.1155/2021/6655813] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2020] [Revised: 12/08/2020] [Accepted: 12/23/2020] [Indexed: 11/20/2022] Open
Abstract
Introduction. Urogenital and vascular anomalies, including a left duplex kidney and a left aberrant renal artery that gave rise to the left ovarian artery, were observed in a 77-year-old female cadaver during a routine dissection. Description. A left aberrant renal artery, which gave rise to the left ovarian artery, was observed originating from the aorta 4 cm below the left renal artery. Two independent contributions to a bifid ureter were found originating from the hilum of the left kidney. These two contributions descended 12.4 cm and 10.6 cm, respectively, posterior to the left aberrant renal artery and lateral to the left ovarian artery before uniting anterior to the psoas major muscle to descend 12.7 cm to the bladder. Significance. While the duplex kidney is a relatively common congenital anomaly that can be asymptomatic, it can also potentially be associated with compression of renal vasculature or the ureter. Ureteral compression can then result in several pathologies including reflux, urinary tract infection (UTI), ureteropelvic junction obstruction, or hydronephrosis. Compression of renal and ovarian vasculature can result in altered blood flow to the kidney and ovary, potentially causing fibrosis, atrophy, or organ failure. Current imaging techniques alone are insufficient for correct diagnostics of such complications, and they must be supplemented with a thorough understanding of the respective anatomical variations.
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11
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Hoff M, Leighton P, Hosgood SA, Nicholson ML. Anastomosis of dual renal transplant veins. J Surg Case Rep 2020; 2020:rjaa310. [PMID: 32963761 PMCID: PMC7490215 DOI: 10.1093/jscr/rjaa310] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2020] [Accepted: 08/13/2020] [Indexed: 11/17/2022] Open
Abstract
As there is usually considerable overlap in the renal venous drainage, it is often possible to ligate supernumerary transplant renal veins in order to simplify the implantation procedure. Nonetheless, decisions about whether to implant multiple veins can be difficult and are usually made subjectively. Here, we describe the use of intraoperative Doppler ultrasound as an adjunct to decision-making when there are two renal veins and a novel technique for the sequential anastomosis of dual veins. The kidney was reperfused after anastomosis of the main renal vein with the second vein clamped. On-table Doppler ultrasound demonstrated reversed flow in diastole indicating that the second renal vein also needed to be anastomosed. By clamping the external iliac vein inferior to the first venous anastomosis it was possible to complete the lower polar renal vein anastomosis to the external iliac vein without interrupting the perfusion of the kidney.
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Affiliation(s)
- Mekhola Hoff
- Department of Surgery, University of Cambridge, Addenbrooke's Hospital, Cambridge, UK
| | - Philippa Leighton
- Department of Surgery, University of Cambridge, Addenbrooke's Hospital, Cambridge, UK
| | - Sarah A Hosgood
- Department of Surgery, University of Cambridge, Addenbrooke's Hospital, Cambridge, UK
| | - Michael L Nicholson
- Department of Surgery, University of Cambridge, Addenbrooke's Hospital, Cambridge, UK
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12
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The Anatomy of Renal Arteries in Adults. SERBIAN JOURNAL OF EXPERIMENTAL AND CLINICAL RESEARCH 2019. [DOI: 10.2478/sjecr-2019-0057] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Abstract
Detailed extraparenhymal renal hilar dissection was performed on 110 fixed cadaveric kidneys (60 from male cadavers and 50 from female cadavers). We analyzed the number of renal arteries, angles between renal arteries and abdominal aorta, length and diameter of the renal arteries. Multiple renal arteries were present in 20.9% of cases, with a slightly higher incidence on the right side (21.8%: 20.0%). The angle between the aorta and the RRA varied from 30° to 100° with a mean of 64.1°, while the angle between the abdominal aorta and the LRA was 40° to 115°, with a mean of 67.3°. The external caliber of the RRA at the point of origin from the abdominal aorta was 5 mm to 9.1 mm, with a mean of 6.8 mm. The same caliber of the LRA was 3.7 to 9.6 mm with a mean of 7.0 mm. The average length of the renal artery from the point of origin from the abdominal aorta to the branching point was 36.2 mm for the right renal artery and 30.7 mm for the left renal artery. The average length of the renal artery from the point of origin from the abdominal aorta to the renal hilum was 65.1 mm for the right one and 54.7 mm for the left one. Knowledge of the number of renal arteries, their mode of entry into the kidney, the angles they build with the abdominal aorta, their diameter and length has practical applications in interventional radiology and surgery of the kidney and its environment.
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Abstract
Imaging plays a crucial role in pre-transplant evaluation to enhance the probability of a successful outcome. Its aim is to define kidney and vascular anatomy and to assess potential pathologies. Each modality has advantages and disadvantages. Computed tomography angiography (CTA) is the most commonly used imaging modality, however, magnetic resonance angiography (MRA) can be used in selected cases. The purpose of this review article is to provide an overview of available imaging modalities, their benefits, risks, advantages, and disadvantages. Imaging findings that indicate particular anomalies and pathologies that may affect living renal donor selection will be discussed.
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Affiliation(s)
- Ayaz Aghayev
- Cardiovascular Imaging Program, Departments of Radiology, Brigham and Women's Hospital and Harvard Medical School, Boston, MA 02115, USA
| | - Sumit Gupta
- Cardiovascular Imaging Program, Departments of Radiology, Brigham and Women's Hospital and Harvard Medical School, Boston, MA 02115, USA
| | - Borna E Dabiri
- Cardiovascular Imaging Program, Departments of Radiology, Brigham and Women's Hospital and Harvard Medical School, Boston, MA 02115, USA
| | - Michael L Steigner
- Cardiovascular Imaging Program, Departments of Radiology, Brigham and Women's Hospital and Harvard Medical School, Boston, MA 02115, USA
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Hostiuc S, Minoiu C, Negoi I, Rusu MC, Hostiuc M. Duplication and transposition of inferior vena cava: A meta-analysis of prevalence. J Vasc Surg Venous Lymphat Disord 2019; 7:742-755. [DOI: 10.1016/j.jvsv.2019.01.063] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2018] [Accepted: 01/27/2019] [Indexed: 12/26/2022]
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15
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Hostiuc S, Rusu MC, Negoi I, Dorobanțu B, Grigoriu M. Anatomical variants of renal veins: A meta-analysis of prevalence. Sci Rep 2019; 9:10802. [PMID: 31346244 PMCID: PMC6658480 DOI: 10.1038/s41598-019-47280-8] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2018] [Accepted: 07/15/2019] [Indexed: 11/22/2022] Open
Abstract
The main aim of this article is to establish the actual prevalence of renal vein variations (circumaortic renal vein, retroaortic renal vein, double renal vein), and to increase awareness about them. To this purpose, we have performed a meta-analysis of prevalence, using the MetaXL package, We included 105 articles in the final analysis of prevalence, of which 88 contained data about retroaortic renal vein, 84 - about circumaortic renal vein, and 51 - about multiple renal veins. The overall prevalence for retroaortic renal vein was 3% (CI:2.4-3.6%), for circumaortic renal vein - 3.5% (CI:2.8-4.4%), and for multiple renal veins - 16.7% (14.3-19.2%), much higher on the right 16.6 (14.2-19.1%) than on the left side 2.1 (1.3-3.2%). The results were relatively homogenous between studies, with only a minor publication bias overall.
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Affiliation(s)
- Sorin Hostiuc
- Carol Davila University of Medicine and Pharmacy, Faculty of Dental Medicine, Department of Legal Medicine and Bioethics, Bucharest, Romania.
| | - Mugurel Constantin Rusu
- Carol Davila University of Medicine and Pharmacy, Faculty of Dental Medicine, Department of Anatomy, Bucharest, Romania
| | - Ionut Negoi
- Carol Davila University of Medicine and Pharmacy, Faculty of Medicine, Department of Surgery, Bucharest, Romania
- Clinical Emergency Hospital, Bucharest, Romania
| | - Bogdan Dorobanțu
- Carol Davila University of Medicine and Pharmacy, Faculty of Medicine, Department of Surgery, Bucharest, Romania
- Fundeni Clinical Institute, Bucharest, Romania
| | - Mihai Grigoriu
- Carol Davila University of Medicine and Pharmacy, Faculty of Medicine, Department of Surgery, Bucharest, Romania
- University Emergency Hospital Bucharest, First Surgery Clinic, Bucharest, Romania
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Lauder L, Ewen S, Tzafriri AR, Edelman ER, Lüscher TF, Blankenstijn PJ, Dörr O, Schlaich M, Sharif F, Voskuil M, Zeller T, Ukena C, Scheller B, Böhm M, Mahfoud F. Renal artery anatomy assessed by quantitative analysis of selective renal angiography in 1,000 patients with hypertension. EUROINTERVENTION 2019; 14:121-128. [PMID: 29633939 DOI: 10.4244/eij-d-18-00112] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
AIMS With increasing attention to renovascular causes and targets for hypertension there arises a critical need for more detailed knowledge of renal arterial anatomy. However, a standardised nomenclature is lacking. The present study sought to develop a standardised nomenclature for renal anatomy considering the complexity and variation of the renal arterial tree and to assess the applicability of the nomenclature. METHODS AND RESULTS One thousand hypertensive patients underwent invasive selective renal artery angiography in nine centres. Further, renovasography was performed in 249 healthy swine as a surrogate for normotensive anatomy. Anatomical parameters were assessed by quantitative vascular analysis. Patients' mean blood pressure was 168/90±26/17 mmHg. The right main renal artery was longer than the left (41±15 mm vs. 35±13 mm, p<0.001), but the left had a greater diameter (5.4±1.2 vs. 5.2±1.2 mm, p<0.001). Accessory renal arteries and renal artery disease were documented in 22% and 9% of the patients, respectively. Other than exhibiting a longer left main renal artery in uncontrolled hypertensives (+2.7 mm, p=0.034) there was no anatomical difference between patients with controlled and uncontrolled hypertension. Main renal artery mean diameter was smaller in patients with impaired kidney function (GFR <90 ml/min, left -0.5 mm, right -0.4 mm, both p<0.001). CONCLUSIONS Renal arterial anatomy differs between sides but shows no difference between patients with and without blood pressure control. Impaired GFR was associated with small main renal artery diameter.
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Affiliation(s)
- Lucas Lauder
- Klinik für Innere Medizin III, Kardiologie, Angiologie und Internistische Intensivmedizin, Universitätsklinikum des Saarlandes, Universität des Saarlandes, Homburg/Saar, Germany
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Cenal U, Erturk T, Karayagiz AH, Ozdemir E, Polatkan SV, Cakir U, Berber I. Geographic Distribution of Multiple Arteries and Veins of 878 Kidney Donors From a Transplant Center in Turkey. Transplant Proc 2019; 51:1086-1088. [PMID: 31101176 DOI: 10.1016/j.transproceed.2019.01.100] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2018] [Accepted: 01/21/2019] [Indexed: 10/27/2022]
Abstract
AIM The diagnosis and management of multiple renal arteries and veins have gained importance with the increasing number of kidney transplantations and improved techniques in interventional radiology and vascular reconstructions. The aim of this study is to define and to detect the rate of multiple renal arteries and veins in our living kidney transplant donors coming from all parts of our country. METHODS Abdominal computed tomography angiogram findings of 878 kidney transplant donors were analyzed. The presence and the distribution of multiple renal arteries and veins in donors coming from 7 geographic regions in Turkey were noted. RESULTS The presence of multiple renal arteries was observed in 34% (48/141) of patients in the Marmara Region, 36.7% (79/215) of patients in the Black Sea Region, 37.2% (64/172) of patients in the Central Anatolia Region and 36.1% (30/83) of patients in the Southeastern Anatolia Region. The highest incidences of multiple renal arteries were observed in the Mediterranean and Aegean regions, affecting 40% (32/80) and 41.9% (26/62) of patients, respectively, while East Anatolia was found to have the lowest incidence, affecting 28% (35/125) of patients. The incidence of multiple renal veins also varied across regions. The highest incidence was observed in the Central Anatolia Region, where 23.3% (40/172) of patients were affected; the lowest was seen in the Aegean Region, where 11.3% (7/62) of patients were affected. In Turkey as a whole, 35.8% (314/878) of patients presented with multiple renal arteries, while the rate of multiple renal veins was found to be 19% (167/878) among our donors. CONCLUSIONS As 80% of the kidney transplantations performed in Turkey involve living donors, we think it will be useful to have knowledge of not only the presence of multiple renal arteries and veins, but also the distribution of this feature throughout the different regions of the country.
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Affiliation(s)
- U Cenal
- Acibadem Mehmet Ali Aydinlar University, Istanbul, Turkey.
| | - T Erturk
- Acibadem Mehmet Ali Aydinlar University, Istanbul, Turkey; Organ Transplantation Center, Acibadem International Hospital, Istanbul, Turkey
| | - A H Karayagiz
- Organ Transplantation Center, Acibadem International Hospital, Istanbul, Turkey
| | - E Ozdemir
- Organ Transplantation Center, Acibadem International Hospital, Istanbul, Turkey
| | - S V Polatkan
- Organ Transplantation Center, Acibadem International Hospital, Istanbul, Turkey
| | - U Cakir
- Acibadem Mehmet Ali Aydinlar University, Istanbul, Turkey; Organ Transplantation Center, Acibadem International Hospital, Istanbul, Turkey
| | - I Berber
- Acibadem Mehmet Ali Aydinlar University, Istanbul, Turkey; Organ Transplantation Center, Acibadem International Hospital, Istanbul, Turkey
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Koinuma K, Horie H, Ito H, Naoi D, Sadatomo A, Tahara M, Inoue Y, Kono Y, Sasaki T, Sugimoto H, Lefor AK, Sata N. Four-directional approach to the meso-transverse attachment combined with preoperative radiological vascular simulation facilitates short-term surgical outcomes in laparoscopic transverse colon cancer surgery. Asian J Endosc Surg 2019; 12:150-156. [PMID: 29963764 DOI: 10.1111/ases.12628] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/24/2018] [Revised: 05/24/2018] [Accepted: 06/07/2018] [Indexed: 12/16/2022]
Abstract
INTRODUCTION Transverse colon resection is one of the most difficult laparoscopic procedures because of anatomic hazards such as variations in the mesenteric vascular anatomy and the complex structure of organs and surrounding membranes. METHODS We evaluated the short-term surgical outcomes of laparoscopic transverse colon resection using a creative approach. This approach included preoperative surgical simulation using virtual surgical anatomy by CT, a four-directional approach to the mesentery, and 3-D imaging during laparoscopic surgery. RESULTS A total of 45 consecutive patients who underwent laparoscopic resection for transverse colon cancer from June 2013 to December 2017 were enrolled in this study. All procedures were completed safely, with minor postoperative complications, including two patients with anastomotic stenosis, two with intra-abdominal phlegmon, one with delayed gastric emptying, and one with pneumonia, all treated non-operatively. There were no conversions to open resection. Operation time was 203 min (range, 125-322 min), and the estimated blood loss during surgery was 5 mL (range, 0-370 mL). The mean postoperative hospital stay was 10 days (range, 7-21 days), and no patients required readmission. CONCLUSION Short-term surgical outcomes after laparoscopic transverse colon resection demonstrated that this creative approach was safe and feasible. The four-directional approach to the meso-transverse attachment combined with preoperative radiological simulation can facilitate laparoscopic transverse colon surgery.
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Affiliation(s)
- Koji Koinuma
- Department of Surgery, Jichi Medical University, Shimotsuke, Japan
| | - Hisanaga Horie
- Department of Surgery, Jichi Medical University, Shimotsuke, Japan
| | - Homare Ito
- Department of Surgery, Jichi Medical University, Shimotsuke, Japan
| | - Daishi Naoi
- Department of Surgery, Jichi Medical University, Shimotsuke, Japan
| | - Ai Sadatomo
- Department of Surgery, Jichi Medical University, Shimotsuke, Japan
| | - Makiko Tahara
- Department of Surgery, Jichi Medical University, Shimotsuke, Japan
| | - Yoshiyuki Inoue
- Department of Surgery, Jichi Medical University, Shimotsuke, Japan
| | - Yoshihiko Kono
- Department of Surgery, Jichi Medical University, Shimotsuke, Japan
| | - Takahiro Sasaki
- Department of Radiology, Jichi Medical University, Shimotsuke, Japan
| | - Hideharu Sugimoto
- Department of Radiology, Jichi Medical University, Shimotsuke, Japan
| | | | - Naohiro Sata
- Department of Surgery, Jichi Medical University, Shimotsuke, Japan
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Nezami N, Naghavi-Behzad M, Piri R, Salari B, Hool S, Khalid Mojadidi M, Ghorashi S, Tarzamni MK, Bijan B. Preoperative Multi-Detector Computed Tomography in Kidney Donors; Quantitative Data Report from Operation Rooms. IRANIAN JOURNAL OF RADIOLOGY 2018. [DOI: 10.5812/iranjradiol.59025] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/08/2023]
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Gulas E, Wysiadecki G, Szymański J, Majos A, Stefańczyk L, Topol M, Polguj M. Morphological and clinical aspects of the occurrence of accessory (multiple) renal arteries. Arch Med Sci 2018; 14:442-453. [PMID: 29593819 PMCID: PMC5868651 DOI: 10.5114/aoms.2015.55203] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/07/2015] [Accepted: 08/16/2015] [Indexed: 11/17/2022] Open
Abstract
Renal vascularization variants vastly differ between individuals due to the very complex embryogenesis of the kidneys. Moreover, each variant may have implications for clinical and surgical interventions. The number of operating procedures continues to grow, and includes renal transplants, aneurysmorrhaphy and other vascular reconstructions. In any surgical technique, unawareness of the presence of multiple renal arteries may result in a fatal outcome, especially if laparoscopic methods are used. The aim of this review is to comprehensively identify the variation within multiple renal arteries and to highlight the connections between the presence of accessory renal arteries and the coexistence of other variants of vascularization. Another aim is to determine the potential clinical implications of the presence of accessory renal arteries. This study is of particular importance for surgeons, intervention radiologists, nephrologists and vascular surgeons.
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Affiliation(s)
- Ewelina Gulas
- Department of Angiology, Interfaculty Chair of Anatomy and Histology, Medical University of Lodz, Lodz, Poland
| | - Grzegorz Wysiadecki
- Department of Normal and Clinical Anatomy, Interfaculty Chair of Anatomy and Histology, Medical University of Lodz, Lodz, Poland
| | - Jacek Szymański
- Department of Normal and Clinical Anatomy, Interfaculty Chair of Anatomy and Histology, Medical University of Lodz, Lodz, Poland
| | - Agata Majos
- Department of Radiological and Isotopic Diagnosis and Therapy, Medical University of Lodz, Lodz, Poland
| | | | - Mirosław Topol
- Department of Normal and Clinical Anatomy, Interfaculty Chair of Anatomy and Histology, Medical University of Lodz, Lodz, Poland
| | - Michał Polguj
- Department of Angiology, Interfaculty Chair of Anatomy and Histology, Medical University of Lodz, Lodz, Poland
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Patil AB, Javali TD, Nagaraj HK, Babu SMLP, Nayak A. Laparoscopic donor nephrectomy in unusual venous anatomy - donor and recepient implications. Int Braz J Urol 2017; 43:671-678. [PMID: 28379667 PMCID: PMC5557443 DOI: 10.1590/s1677-5538.ibju.2016.0309] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2016] [Accepted: 10/01/2016] [Indexed: 11/22/2022] Open
Abstract
OBJECTIVES Laparoscopic donor nephrectomy is now a commonly performed procedure in most of renal transplantation centers. However, the suitability of laparoscopy for donors with abnormal venous anatomy is still a subject of debate. MATERIALS AND METHODS Between August 2007 and August 2014, 243 laparoscopic donor nephrectomies were performed in our institution. All donors were evaluated with preoperative three-dimensional spiral computed tomography (CT) angiography Thirteen (5.35%) donors had a left renal vein anomaly. A retrospective analysis was performed to collect donor and recipient demographics and perioperative data. RESULTS Four donors had a type I retroaortic vein, seven had type II retroaortic vein and a circumaortic vein was seen in three donors. The mean operative time was 114±11 minutes and mean warm ischemia time was 202±12 seconds. The mean blood loss was 52.7±18.4mL and no donor required blood transfusion. Mean recipient creatinine at the time of discharge was 1.15±0.18mg/dL, and creatinine at six months and one year follow-up was 1.12±0.13mg/dL and 1.2±0.14mg/dL, respectively. There were no significant differences in operative time, blood loss, warm ischemia time, donor hospital stay or recipient creatinine at 6 months follow-up, following laparoscopic donor nephrectomy in patients with or without left renal vein anomalies. CONCLUSION Preoperative delineation of venous anatomy using CT angiography is as important as arterial anatomy. Laparoscopic donor nephrectomy is safe and feasible in patients with retroaortic or circumaortic renal vein with good recipient outcome.
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Affiliation(s)
| | | | | | | | - Arvind Nayak
- Department of Urology, M.S. Ramaiah Hospital, Bangalore
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Moustafa AS, Abdel Aal AK, Ertel N, Saad N, DuBay D, Saddekni S. Chemoembolization of Hepatocellular Carcinoma with Extrahepatic Collateral Blood Supply: Anatomic and Technical Considerations. Radiographics 2017; 37:963-977. [PMID: 28362557 DOI: 10.1148/rg.2017160122] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Transarterial chemoembolization (TACE) is considered a standard local-regional treatment for intermediate-stage hepatocellular carcinoma (HCC) and the most common bridging therapy. This treatment is offered to more than 70% of patients who are on the waiting list for liver transplantation in the United States. HCC typically receives its blood supply from the hepatic artery; however, it can recruit a parasitic supply from extrahepatic collateral (EHC) arteries. The development of an EHC arterial blood supply can interfere with the therapeutic efficacy of TACE and result in treatment failure and poor outcome. Cross-sectional imaging-specifically computed tomography and magnetic resonance imaging-has some limitations in depicting the presence or absence of an EHC arterial supply during the pre-TACE evaluation. Catheterization and angiography of every possible EHC artery during a routine TACE procedure would be time consuming and technically challenging and would not always be feasible. Therefore, the prediction of a potential EHC arterial supply on the basis of tumor location before, during, and after TACE is fundamental to achieving optimal therapeutic efficacy. To perform TACE through EHC arteries, special considerations are necessary to avoid potentially serious complications. The authors review the factors influencing the development of an EHC arterial blood supply to HCC and describe a systematic approach to enhance the ability to predict the presence of EHC arteries. They also describe the proper technique for TACE of each EHC artery and how to avoid potential technique-related complications. ©RSNA, 2017.
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Affiliation(s)
- Amr Soliman Moustafa
- From the Department of Radiology, University of Arkansas for Medical Science, Little Rock, Ark, and Department of Radiology, Zagazig University, Zagazig, Egypt (A.S.M.); Departments of Radiology (A.K.A.A., N.E., S.S.) and Surgery (D.D.), University of Alabama at Birmingham, 619 19th St South, Birmingham, AL 35249; Department of Radiology, University of Cairo, Cairo, Egypt (A.K.A.A.); and Department of Radiology, Washington University School of Medicine, St Louis, Mo (N.S.)
| | - Ahmed Kamel Abdel Aal
- From the Department of Radiology, University of Arkansas for Medical Science, Little Rock, Ark, and Department of Radiology, Zagazig University, Zagazig, Egypt (A.S.M.); Departments of Radiology (A.K.A.A., N.E., S.S.) and Surgery (D.D.), University of Alabama at Birmingham, 619 19th St South, Birmingham, AL 35249; Department of Radiology, University of Cairo, Cairo, Egypt (A.K.A.A.); and Department of Radiology, Washington University School of Medicine, St Louis, Mo (N.S.)
| | - Nathan Ertel
- From the Department of Radiology, University of Arkansas for Medical Science, Little Rock, Ark, and Department of Radiology, Zagazig University, Zagazig, Egypt (A.S.M.); Departments of Radiology (A.K.A.A., N.E., S.S.) and Surgery (D.D.), University of Alabama at Birmingham, 619 19th St South, Birmingham, AL 35249; Department of Radiology, University of Cairo, Cairo, Egypt (A.K.A.A.); and Department of Radiology, Washington University School of Medicine, St Louis, Mo (N.S.)
| | - Nael Saad
- From the Department of Radiology, University of Arkansas for Medical Science, Little Rock, Ark, and Department of Radiology, Zagazig University, Zagazig, Egypt (A.S.M.); Departments of Radiology (A.K.A.A., N.E., S.S.) and Surgery (D.D.), University of Alabama at Birmingham, 619 19th St South, Birmingham, AL 35249; Department of Radiology, University of Cairo, Cairo, Egypt (A.K.A.A.); and Department of Radiology, Washington University School of Medicine, St Louis, Mo (N.S.)
| | - Derek DuBay
- From the Department of Radiology, University of Arkansas for Medical Science, Little Rock, Ark, and Department of Radiology, Zagazig University, Zagazig, Egypt (A.S.M.); Departments of Radiology (A.K.A.A., N.E., S.S.) and Surgery (D.D.), University of Alabama at Birmingham, 619 19th St South, Birmingham, AL 35249; Department of Radiology, University of Cairo, Cairo, Egypt (A.K.A.A.); and Department of Radiology, Washington University School of Medicine, St Louis, Mo (N.S.)
| | - Souheil Saddekni
- From the Department of Radiology, University of Arkansas for Medical Science, Little Rock, Ark, and Department of Radiology, Zagazig University, Zagazig, Egypt (A.S.M.); Departments of Radiology (A.K.A.A., N.E., S.S.) and Surgery (D.D.), University of Alabama at Birmingham, 619 19th St South, Birmingham, AL 35249; Department of Radiology, University of Cairo, Cairo, Egypt (A.K.A.A.); and Department of Radiology, Washington University School of Medicine, St Louis, Mo (N.S.)
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Preoperative assessment of vascular anatomy by multidetector computed tomography before laparoscopic colectomy for transverse colon cancer: report of a case. Int Surg 2016; 100:208-12. [PMID: 25692419 DOI: 10.9738/intsurg-d-13-00232.1] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
Although the safety of laparoscopic surgery for colon cancer has been reported in many randomized controlled trials, concerns about the difficulty of surgery for transverse colon cancer has not been fully resolved, mainly because of the variation in the vascular anatomy of mesenteric vessels, which leads to difficulty in determining the optimal operative procedure and the extent of lymph node dissection. We present the case of a patient with transverse colon cancer who underwent laparoscopic surgery after preoperative assessment using a combination of endoscopic clipping and three-dimensional computed tomography angiography (3DCTA). A 68-year-old man was diagnosed with transverse colon cancer, and laparoscopic surgery has been planned. 3DCTA showed right-middle and left-middle colic arteries arising independently from the superior mesenteric artery. The relationship between the clip and vessels showed that the right-middle colic artery was the feeding artery of the tumor. Operative findings were consistent with 3DCTA findings, and transverse colectomy with lymph node dissection was successfully performed.
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Hiramitsu T, Okada M, Futamura K, Yamamoto T, Tsujita M, Goto N, Narumi S, Watarai Y. Impact of grafting using thin upper pole artery ligation on living-donor adult kidney transplantation: The STROBE study. Medicine (Baltimore) 2016; 95:e5188. [PMID: 27759654 PMCID: PMC5079338 DOI: 10.1097/md.0000000000005188] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
Abstract
This study aimed to investigate the impact of grafting using thin upper pole artery ligation for living-donor adult kidney transplantation. Few reports have examined the safety of thin upper pole artery ligation.Between January 2008 and May 2015, 613 consecutive living-donor adult kidney transplantations were performed. We excluded 21 recipients who experienced graft loss due to factors that were unrelated to surgical complications and 3 recipients with grafts treated with arterial reconstruction and thin upper pole artery ligation for 3 arteries. We included 439 kidney grafts with single arteries (Single Artery Group), 123 with reconstructed arteries (Arterial Reconstruction Group) and 27 with ligated thin upper pole arteries (Arterial Ligation Group) in this retrospective cohort study. To evaluate the safety of thin upper pole artery ligation, we compared the Arterial Ligation Group with the Single Artery and Arterial Reconstruction groups. We evaluated the characteristics of the enrolled donors, recipients, and their grafts. Thereafter, we investigated recipients' perioperative and postoperative estimated glomerular filtration rate (eGFR) and complication rates.Significant differences among the 3 groups were identified for donor sex and endoscopic nephrectomy rates. Recipient eGFR and the complication rates were adjusted according to these factors. The perioperative and postoperative eGFR of recipients did not differ significantly in the Arterial Reconstruction and Single Artery groups with low complication rates.Thin upper pole artery ligation is a safe procedure for living-donor adult kidney transplantation and may prevent unnecessary arterial reconstruction and associated complications.
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Affiliation(s)
- Takahisa Hiramitsu
- Department of Transplant and Endocrine Surgery, Nagoya Daini Red Cross Hospital, Myoken-cho, Showa-ku, Nagoya, Aichi, Japan
- Correspondence: Takahisa Hiramitsu, Department of Transplant and Endocrine Surgery, Nagoya Daini Red Cross Hospital, Myoken-cho, Showa-ku, Nagoya, Aichi, Japan (e-mail: )
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Çınar C, Türkvatan A. Prevalence of renal vascular variations: Evaluation with MDCT angiography. Diagn Interv Imaging 2016; 97:891-7. [DOI: 10.1016/j.diii.2016.04.001] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2015] [Revised: 03/30/2016] [Accepted: 04/05/2016] [Indexed: 01/01/2023]
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Pandya VK, Patel AS, Sutariya HC, Gandhi SP. Evaluation of renal vascular anatomy in live renal donors: Role of multi detector computed tomography. Urol Ann 2016; 8:270-6. [PMID: 27453646 PMCID: PMC4944617 DOI: 10.4103/0974-7796.184898] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
Abstract
Background: Evaluation of renal vascular variations is important in renal donors to avoid vascular complications during surgery. Venous variations, mainly resulting from the errors of the embryological development, are frequently observed. Aim: This retrospective cross-sectional study aimed to investigate the renal vascular variants with multidetector computed tomography (MDCT) angiography to provide valuable information for surgery and its correlations with surgical findings. Materials and Methods: A total of 200 patients underwent MDCT angiography as a routine work up for live renal donors. The number, course, and drainage patterns of the renal veins were retrospectively observed from the scans. Anomalies of renal veins and inferior vena cava (IVC) were recorded and classified. Multiplanar reformations (MPRs), maximum intensity projections, and volume rendering were used for analysis. The results obtained were correlated surgically. Results: In the present study, out of 200 healthy donors, the standard pattern of drainage of renal veins was observed in only 67% of donors on the right side and 92% of donors on the left side. Supernumerary renal veins in the form of dual and triple renal veins were seen on the right side in about 32.5% of donors (dual right renal veins in 30.5% cases and triple right renal veins in 2.5% cases). Variations on the left side were classified into four groups: supernumerary, retro-aortic, circumaortic, and plexiform left renal veins in 1%, 2.5%, 4%, 0.5%, cases respectively. Conclusions: Developmental variations in renal veins can be easily detected on computed tomography scan, which can go unnoticed and can pose a fatal threat during major surgeries such as donor nephrectomies in otherwise healthy donors if undiagnosed.
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Affiliation(s)
- Vaidehi Kumudchandra Pandya
- Department of Radio Diagnosis and Imaging, G.R. Doshi and K.M. Mehta Institute of Kidney Diseases and Research Centre and Dr. H. L. Trivedi Institute of Transplantation Sciences, Ahmedabad, Gujarat, India
| | | | - Harsh Chandrakant Sutariya
- Department of Radio Diagnosis and Imaging, G.R. Doshi and K.M. Mehta Institute of Kidney Diseases and Research Centre and Dr. H. L. Trivedi Institute of Transplantation Sciences, Ahmedabad, Gujarat, India
| | - Shruti Pradipkumar Gandhi
- Department of Radio Diagnosis and Imaging, G.R. Doshi and K.M. Mehta Institute of Kidney Diseases and Research Centre and Dr. H. L. Trivedi Institute of Transplantation Sciences, Ahmedabad, Gujarat, India
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Gulati M, Dermendjian H, Gómez AM, Tan N, Margolis DJ, Lu DS, Gritsch HA, Raman SS. 3.0Tesla magnetic resonance angiography (MRA) for comprehensive renal evaluation of living renal donors: pilot study with computerized tomography angiography (CTA) comparison. Clin Imaging 2016; 40:370-7. [PMID: 27133670 DOI: 10.1016/j.clinimag.2016.01.010] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2015] [Revised: 01/10/2016] [Accepted: 01/21/2016] [Indexed: 10/22/2022]
Abstract
PURPOSE Most living related donor (LRD) kidneys are harvested laparoscopically. Renal vascular anatomy helps determine donor suitability for laparoscopic nephrectomy. Computed tomography angiography (CTA) is the current gold standard for preoperative imaging; magnetic resonance angiography (MRA) offers advantages including lack of ionizing radiation and lower incidence of contrast reactions. We evaluated 3.0T MRA for assessing renal anatomy of LRDs. MATERIALS AND METHODS Thirty consecutive LRDs underwent CTA followed by 3.0T MRA. Data points included number and branching of vessels, incidental findings, and urothelial opacification. Studies were individually evaluated by three readers blinded to patient data. Studies were reevaluated in consensus with discrepancies revealed, and final consensus results were labeled "truth". RESULTS Compared with consensus "truth", both computed tomography (CT) and magnetic resonance imaging were highly accurate for assessment of arterial and venous anatomy, although CT was superior for detection of late venous confluence as well as detection of renal stones. Both modalities were comparable in opacification of lower ureters and bladder; MRA underperformed CTA for opacification of upper urinary tracts. CONCLUSIONS 3.0T MRA enabled excellent detection of comprehensive renal anatomy compared to CTA in LRDs.
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Affiliation(s)
- Mittul Gulati
- Department of Radiology, University of Southern California Keck School of Medicine, Los Angeles, CA
| | - Harout Dermendjian
- Department of Radiology, University of Southern California Keck School of Medicine, Los Angeles, CA.
| | - Ana M Gómez
- Department of Radiology, David Geffen School of Medicine, University Of California Los Angeles, Los Angeles, CA
| | - Nelly Tan
- Department of Radiology, David Geffen School of Medicine, University Of California Los Angeles, Los Angeles, CA
| | - Daniel J Margolis
- Department of Radiology, David Geffen School of Medicine, University Of California Los Angeles, Los Angeles, CA
| | - David S Lu
- Department of Radiology, David Geffen School of Medicine, University Of California Los Angeles, Los Angeles, CA
| | - H Albin Gritsch
- Department of Urology, David Geffen School of Medicine, University Of California Los Angeles, Los Angeles, CA
| | - Steven S Raman
- Department of Radiology, David Geffen School of Medicine, University Of California Los Angeles, Los Angeles, CA
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Grossman A, Koren R, Tirosh A, Michowiz R, Shohat Z, Rahamimov R, Mor E, Shimon I, Robenshtok E. Prevalence and clinical characteristics of adrenal incidentalomas in potential kidney donors. Endocr Res 2016; 41:98-102. [PMID: 26541634 DOI: 10.3109/07435800.2015.1076455] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
BACKGROUND The prevalence of adrenal incidentalomas (AIs) in asymptomatic individuals is unknown. This study evaluated the prevalence of AIs in healthy kidney donors in whom pre-operative computed tomography (CT) is performed routinely. METHODS All potential kidney donors evaluated at the Rabin Medical Center who had routine abdominal CT were identified and their medical records were retrospectively reviewed. Subjects who had normal CT scans were compared with those with a finding of an AI, evaluating demographic (age, body mass index, systolic and diastolic blood pressure) and laboratory variables (glucose, sodium, potassium, calcium, phosphorus, albumin and creatinine). In addition, prevalence of hypertension, rate of donation and surgical mortality were compared between the two groups. RESULTS CT was performed in 673 potential kidney donors. Of these, 645 had a normal CT and 28 (4.2%) had evidence of an AI. Those with AIs had a similar prevalence of hypertension, kidney donation and surgical mortality as those with a normal CT. Those with AIs were older (50.93 ± 11.1 versus 43.76 ± 11.1 years) but other demographic variables were similar; laboratory variables were also similar except for slightly lower albumin and creatinine in those with AIs. CONCLUSIONS The prevalence of AIs is high even in healthy asymptomatic individuals.
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Affiliation(s)
- Alon Grossman
- a Endocrinology and Metabolism Unit , Rabin Medical Center , Petah Tikva , Israel
- b Sackler Faculty of Medicine , Tel Aviv University
| | - Ronit Koren
- a Endocrinology and Metabolism Unit , Rabin Medical Center , Petah Tikva , Israel
- b Sackler Faculty of Medicine , Tel Aviv University
| | - Amit Tirosh
- a Endocrinology and Metabolism Unit , Rabin Medical Center , Petah Tikva , Israel
- b Sackler Faculty of Medicine , Tel Aviv University
| | - Rachel Michowiz
- b Sackler Faculty of Medicine , Tel Aviv University
- c Department of Transplantation , Rabin Medical Center, Beilinson Campus , Israel
| | - Zippora Shohat
- d Bio-Statistical Unit , Rabin Medical Center, Beilinson Campus , Israel
| | - Ruth Rahamimov
- b Sackler Faculty of Medicine , Tel Aviv University
- c Department of Transplantation , Rabin Medical Center, Beilinson Campus , Israel
| | - Eytan Mor
- b Sackler Faculty of Medicine , Tel Aviv University
- c Department of Transplantation , Rabin Medical Center, Beilinson Campus , Israel
| | - Ilan Shimon
- a Endocrinology and Metabolism Unit , Rabin Medical Center , Petah Tikva , Israel
- b Sackler Faculty of Medicine , Tel Aviv University
| | - Eyal Robenshtok
- a Endocrinology and Metabolism Unit , Rabin Medical Center , Petah Tikva , Israel
- b Sackler Faculty of Medicine , Tel Aviv University
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Tarzamni MK, Nezami N, Zomorrodi A, Fathi-Noroozlou S, Piri R, Naghavi-Behzad M, Mojadidi MK, Bijan B. Renal Collecting System Anatomy in Living Kidney Donors by Computed Tomographic Urography: Protocol Accuracy Compared to Intravenous Pyelographic and Surgical Findings. J Clin Imaging Sci 2016; 6:1. [PMID: 26958431 PMCID: PMC4766870 DOI: 10.4103/2156-7514.175079] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2015] [Accepted: 12/25/2015] [Indexed: 11/04/2022] Open
Abstract
OBJECTIVES To evaluate the accuracy of triple-bolus computed tomography urography (CTU) as a surrogate of intravenous pyelography (IVP) for determining the anatomy of the urinary collecting system in living kidney donors. MATERIALS AND METHODS In an analytic descriptive cross-sectional study, 36 healthy kidney donors were recruited during 12 months. Preoperative IVP and CTU were utilized to evaluate kidneys' anatomy; major and minor calyces and variation were used as anatomical indices to compare the accuracy of CTU and IVP; the images were then compared to surgical findings. RESULTS Thirty-six kidney donors (92% male; mean age: 28 ± 6 years) were enrolled in this study. The kappa coefficient value was significant and almost perfect for the CTU and IVP findings in detecting the pattern of calyces (kappa coefficient 0.92, asymptotic 95% confidence interval 0.86-0.97). Anatomic variations or anomalies of the urinary collecting system included the bifid pelvis (5.6%), duplication (8.3%), and extra-renal pelvis (2.8%). Both the sensitivity and specificity of CTU in the detection of the anatomy and variations were 100%; the sensitivity and specificity of IVP were 83.3% and 100%, respectively. CONCLUSIONS The triple-bolus preoperative CTU can be considered an alternative to IVP for assessing the anatomy of the urinary collecting system.
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Affiliation(s)
| | - Nariman Nezami
- Department of Radiology and Biomedical Imaging, Yale University School of Medicine, New Haven, CT, USA
| | - Afshar Zomorrodi
- Department of Urology and Transplantation, Tabriz University of Medical Sciences, Tabriz, Iran
| | | | - Reza Piri
- Student's Research Committee, Tabriz University of Medical Sciences, Tabriz, Iran; Liver and Gastrointestinal Diseases Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Mohammad Naghavi-Behzad
- Medical Philosophy and History Research Centre, Tabriz University of Medical Sciences, Tabriz, Iran; Cardiovascular Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Mohammad Khalid Mojadidi
- Department of Medicine, Division of Cardiology, University of Florida College of Medicine, Gainesville, Florida, USA
| | - Bijan Bijan
- Department of Diagnostic Radiology and Nuclear Medicine, University of California Davis Medical Center, Sacramento, CA, USA
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Gulas E, Wysiadecki G, Cecot T, Majos A, Stefańczyk L, Topol M, Polguj M. Accessory (multiple) renal arteries - Differences in frequency according to population, visualizing techniques and stage of morphological development. Vascular 2016; 24:531-7. [PMID: 26945775 DOI: 10.1177/1708538116631223] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
The aim of this paper is to comprehensively analyze the literature focused on frequency of the presence of the accessory renal arteries in the human body. A systematic analysis of papers has been made. With regard to ethnicity, the incidence of accessory renal arteries fluctuates from 4% in a Malaysian population to 61.5% in a Brazilian population. The frequency is lowest in eastern and southern Asia (from 4% to 18.4%). In some, not ethnically homogenous populations, wide span of occurrence of accessory renal arteries is described (e.g. American - averaging from 18% to 28.8%). A higher frequency of accessory renal arteries was observed in fetuses compared to adults. Moreover, differences in the presence and number of accessory renal arteries reported in different papers are a consequence of type of visualizing technique used in research - especially when computed tomography and anatomical dissection were compared. The increasing number of surgical interventions, especially where laparoscopic methods are concerned, underlines the importance of such knowledge especially to surgeons, interventional radiologists, nephrologists, and vascular surgeons.
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Affiliation(s)
- Ewelina Gulas
- Department of Angiology, Medical University of Łódź, Narutowicza, Poland
| | - Grzegorz Wysiadecki
- Department of Normal and Clinical Anatomy, Medical University of Łódź, Narutowicza, Poland
| | - Tomasz Cecot
- Centre for Learning Anatomical Sciences, University of Southampton, Great Britain
| | - Agata Majos
- Department of Radiological and Isotopic Diagnosis and Therapy, Medical University of Łódź, Żeromskiego, Poland
| | - Ludomir Stefańczyk
- Department of Radiology, Medical University of Łódź, Kopcińskiego, Poland
| | - Mirosław Topol
- Department of Normal and Clinical Anatomy, Medical University of Łódź, Narutowicza, Poland
| | - Michał Polguj
- Department of Angiology, Medical University of Łódź, Narutowicza, Poland
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Ghonge NP, Gadanayak S, Rajakumari V. MDCT evaluation of potential living renal donor, prior to laparoscopic donor nephrectomy: What the transplant surgeon wants to know? Indian J Radiol Imaging 2014; 24:367-78. [PMID: 25489130 PMCID: PMC4247506 DOI: 10.4103/0971-3026.143899] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023] Open
Abstract
As Laparoscopic Donor Nephrectomy (LDN) offers several advantages for the donor such as lesser post-operative pain, fewer cosmetic concerns and faster recovery time, there is growing global trend towards LDN as compared to open nephrectomy. Comprehensive pre-LDN donor evaluation includes assessment of renal morphology including pelvi-calyceal and vascular system. Apart from donor selection, evaluation of the regional anatomy allows precise surgical planning. Due to limited visualization during laparoscopic renal harvesting, detailed pre-transplant evaluation of regional anatomy, including the renal venous anatomy is of utmost importance. MDCT is the modality of choice for pre-LDN evaluation of potential renal donors. Apart from appropriate scan protocol and post-processing methods, detailed understanding of surgical techniques is essential for the Radiologist for accurate image interpretation during pre-LDN MDCT evaluation of potential renal donors. This review article describes MDCT evaluation of potential living renal donor, prior to LDN with emphasis on scan protocol, post-processing methods and image interpretation. The article laid special emphasis on surgical perspectives of pre-LDN MDCT evaluation and addresses important points which transplant surgeons want to know.
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Affiliation(s)
- Nitin P Ghonge
- Department of Radiology, Indraprastha Apollo Hospital, New Delhi, India
| | | | - Vijaya Rajakumari
- Department of Renal Transplantation, Indraprastha Apollo Hospital, New Delhi, India
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Park SY, Kim CK, Kim E, Park BK. Noncontrast-enhanced magnetic resonance renal angiography using a repetitive artery and venous labelling technique at 3 T: comparison with contrast-enhanced magnetic resonance angiography in subjects with normal renal function. Eur Radiol 2014; 25:533-40. [DOI: 10.1007/s00330-014-3416-2] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2014] [Revised: 07/16/2014] [Accepted: 08/26/2014] [Indexed: 11/29/2022]
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Ishikawa M, Yamagami T, Kakizawa H, Hieda M, Toyota N, Fukumoto W, Kajiwara K, Yoshimatsu R, Aikata H, Chayama K, Awai K. Transarterial Therapy of Hepatocellular Carcinoma Fed by the Right Renal Capsular Artery. J Vasc Interv Radiol 2014; 25:389-95. [DOI: 10.1016/j.jvir.2013.11.009] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2013] [Revised: 11/11/2013] [Accepted: 11/11/2013] [Indexed: 01/30/2023] Open
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Rashid RJ, Tarzemani MK, Mohtasham MA, Zomorrodi A, Kakaei F, Jalili J, Habibzadeh A. Diagnostic accuracy of 64-MDCT angiography in the preoperative evaluation of renal vessels and compared with laparotomy findings in living donor kidney. Ren Fail 2013; 36:327-31. [PMID: 24289242 DOI: 10.3109/0886022x.2013.862768] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
INTRODUCTION Multidetector-row computed tomography (MDCT) angiography is a reliable technique in preoperative renal anatomy evaluation in live renal donors. OBJECTIVES To investigate the accuracy of early arterial phase findings and compares them with intraoperative findings. METHODS In this prospective study, 100 potential live donors undergoing preoperative MDCT and nephrectomy during 2010-2013 were included. The examination was performed with a 64-detector scanner including early arterial and venous phase. MDCT angiography started by bolus tracking and venous phase was acquired 9 s after arterial phase. Anatomical findings and vein and artery attenuation values were recorded and arterial phase findings were compared with intraoperative findings. RESULTS All anatomical findings reported by MDCT in early arterial phase were confirmed by intraoperative findings with sensitivity of 100%. Right renal vein was supernumerary in 17 cases and left renal vein was circumaortic in 3 and retroaortic in 5 cases. Renal arteries had early branching in 13, two arteries in 12 and accessory in 8 cases. Vein and artery attenuation values had significant difference between early arterial and venous phase (p < 0.001). CONCLUSION Early arterial phase has similar results to venous phase in preoperative evaluation and intraoperative findings and could be used alone to reduce radiation dose.
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Refaat R, Elia RZ, ElSaeed KO. The value of 16-slice multidetector computed tomographic angiography in preoperative appraisal of vascular anatomy in potential living renal donors. THE EGYPTIAN JOURNAL OF RADIOLOGY AND NUCLEAR MEDICINE 2013. [DOI: 10.1016/j.ejrnm.2013.08.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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Utility of 16-multidetector CT angiography in the preoperative evaluation of vascular and ureteral anatomy of donor nephrectomy. AFRICAN JOURNAL OF UROLOGY 2013. [DOI: 10.1016/j.afju.2012.10.007] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
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Srivastava S, Kumar I, Babu CSR, Gupta KK, Gupta OP. Clinical insight into the precaval right renal artery: a multidetector row computed tomography angiographic study. ISRN ANATOMY 2013; 2013:250950. [PMID: 25938096 PMCID: PMC4392942 DOI: 10.5402/2013/250950] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/30/2013] [Accepted: 02/28/2013] [Indexed: 11/23/2022]
Abstract
Variations of course and number of renal vessels are not so uncommon and their knowledge is important for planning of minimally invasive renal surgeries. The earlier literature reports a prevalence of precaval right renal artery between 0.8% and 5%. Normally, the right renal artery passes posterior to the inferior vena cava, but it can also be precaval where it passes anterior to inferior vena cava. The multidetector row contrast enhanced computed tomography angiography allows precise evaluation of renal vasculature. The aim of this retrospective study is to determine the prevalence of precaval right renal artery. Amongst 73 MDCT scans studied, we identified 4 cases of precaval right renal artery with the prevalence being 5.48%, more than what is reported in the earlier literature. We also report a single and dominant precaval right renal artery in one of the cases, which is a rare finding. On the basis of these results, we conclude that precaval right renal artery appears to be more common and so the knowledge of this variant holds a major clinical implication in preventing misinterpretation of radiological images and proper planning of interventional procedures and minimally invasive surgeries.
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Affiliation(s)
- Shubha Srivastava
- Department of Anatomy, Muzaffarnagar Medical College, Muzaffarnagar 251203, India
| | - Indra Kumar
- Department of Anatomy, Hind Institute of Medical Sciences, Safedabad, Barabanki 225003, India
| | - C S Ramesh Babu
- Department of Anatomy, Muzaffarnagar Medical College, Muzaffarnagar 251203, India
| | - K K Gupta
- OP Gupta Imaging Center, Bachcha Park, Meerut 250002, India
| | - O P Gupta
- OP Gupta Imaging Center, Bachcha Park, Meerut 250002, India
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Liefeldt L, Klüner C, Glander P, Giessing M, Budde K, Taupitz M, Rogalla P, Kroencke TJ. Non-invasive imaging of living kidney donors: intraindividual comparison of multislice computed tomography angiography with magnetic resonance angiography. Clin Transplant 2012; 26:E412-7. [DOI: 10.1111/j.1399-0012.2012.01680.x] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Affiliation(s)
- Lutz Liefeldt
- Department of Nephrology; Campus Charité Mitte; Charité - Universitätsmedizin Berlin; Berlin; Germany
| | - Claudia Klüner
- Department of Radiology; Campus Charité Mitte; Charité - Universitätsmedizin Berlin; Berlin; Germany
| | - Petra Glander
- Department of Nephrology; Campus Charité Mitte; Charité - Universitätsmedizin Berlin; Berlin; Germany
| | - Markus Giessing
- Department of Urology; Universität Düsseldorf; Berlin; Germany
| | - Klemens Budde
- Department of Nephrology; Campus Charité Mitte; Charité - Universitätsmedizin Berlin; Berlin; Germany
| | - Matthias Taupitz
- Department of Radiology; Campus Benjamin Franklin; Charité - Universitätsmedizin Berlin; Berlin; Germany
| | - Patrik Rogalla
- Department of Radiology; Campus Charité Mitte; Charité - Universitätsmedizin Berlin; Berlin; Germany
| | - Thomas J. Kroencke
- Department of Radiology; Campus Charité Mitte; Charité - Universitätsmedizin Berlin; Berlin; Germany
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An automatic method for renal cortex segmentation on CT images: evaluation on kidney donors. Acad Radiol 2012; 19:562-70. [PMID: 22341876 DOI: 10.1016/j.acra.2012.01.005] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2011] [Revised: 12/29/2011] [Accepted: 01/09/2012] [Indexed: 12/21/2022]
Abstract
RATIONALE AND OBJECTIVES The aims of this study were to develop and validate an automated method to segment the renal cortex on contrast-enhanced abdominal computed tomographic images from kidney donors and to track cortex volume change after donation. MATERIALS AND METHODS A three-dimensional fully automated renal cortex segmentation method was developed and validated on 37 arterial phase computed tomographic data sets (27 patients, 10 of whom underwent two computed tomographic scans before and after nephrectomy) using leave-one-out strategy. Two expert interpreters manually segmented the cortex slice by slice, and linear regression analysis and Bland-Altman plots were used to compare automated and manual segmentation. The true-positive and false-positive volume fractions were also calculated to evaluate the accuracy of the proposed method. Cortex volume changes in 10 subjects were also calculated. RESULTS The linear regression analysis results showed that the automated and manual segmentation methods had strong correlations, with Pearson's correlations of 0.9529, 0.9309, 0.9283, and 0.9124 between intraobserver variation, interobserver variation, automated and user 1, and automated and user 2, respectively (P < .001 for all analyses). The Bland-Altman plots for cortex segmentation also showed that the automated and manual methods had agreeable segmentation. The mean volume increase of the cortex for the 10 subjects was 35.1 ± 13.2% (P < .01 by paired t test). The overall true-positive and false-positive volume fractions for cortex segmentation were 90.15 ± 3.11% and 0.85 ± 0.05%. With the proposed automated method, the time for cortex segmentation was reduced from 20 minutes for manual segmentation to 2 minutes. CONCLUSIONS The proposed method was accurate and efficient and can replace the current subjective and time-consuming manual procedure. The computer measurement confirms the volume of renal cortex increases after kidney donation.
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The three most common variations of the left renal vein: a review and meta-analysis. Surg Radiol Anat 2012; 34:799-804. [DOI: 10.1007/s00276-012-0968-1] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2011] [Accepted: 03/24/2012] [Indexed: 10/28/2022]
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Anjamrooz SH, Azari H, Abedinzadeh M. Abnormal patterns of the renal veins. Anat Cell Biol 2012; 45:57-61. [PMID: 22536553 PMCID: PMC3328742 DOI: 10.5115/acb.2012.45.1.57] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2012] [Revised: 03/01/2012] [Accepted: 03/09/2012] [Indexed: 11/27/2022] Open
Abstract
Knowledge of the renal vascular anatomy may greatly contribute to the success of surgical, invasive and radiological procedures of the retroperitoneal region. Here, morphometric and histological studies of a human cadaveric specimen presented a complex, anomalous pattern of renal veins. The left renal vein had an oblique retro-aortic course and received two lumbar veins. It bifurcated near its drainage point into the inferior vena cava. The right renal vein received the right testicular vein. In addition, the left kidney was located at a low position. The spleen was enlarged. The present case is unique and provides information that may help surgeons or angiologists to apply safer interventions.
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Affiliation(s)
- Seyed Hadi Anjamrooz
- Department of Anatomical Sciences, School of Medicine, Kurdistan University of Medical Sciences, Sanandaj, Iran
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Gümüş H, Bükte Y, Ozdemir E, Cetinçakmak MG, Tekbaş G, Ekici F, Onder H, Uyar A. Variations of renal artery in 820 patients using 64-detector CT-angiography. Ren Fail 2012; 34:286-90. [PMID: 22251313 DOI: 10.3109/0886022x.2011.647295] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
PURPOSE Renal artery variations are important for clinical reasons. The aim of this study is to determine the originating level and variations of renal arteries with 64-channel multidetector computed tomography (MDCT). MATERIALS AND METHODS In a university hospital, 820 patients who underwent MDCT angiography of the abdominal aorta were retrospectively evaluated. The number, early division (ED), and originating level of renal artery were evaluated retrospectively. Variations of the renal artery on both sides, the difference between the genders with variations of the renal artery, were compared with chi-square test. RESULTS Renal artery originating from the level of L1-L2 intervertebral disc was found in 37.0% and 38.9% of patients on the right and left sides, respectively. Renal artery variations, including extrarenal artery (ERA), were found in 27% and ED in 26.7% of the patients. Significant differences were found in ED and ERA prevalence for genders (p = 0.006 and p = 0.043, respectively). The prevalence of both variations is higher in males. CONCLUSIONS An awareness of renal vascular variations is very important for both surgeons and radiologists. In this series, renal arterial variations were found in approximately one-fourth of the study population.
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Affiliation(s)
- Hatice Gümüş
- Department of Radiology, Medical School, Dicle University, Diyarbakir, Turkey.
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Laurence I, Ariff B, Quest RA, Moser S, Glover A, Taube D, Gishen P, Papalois V, Juli C. Is there a role for free breathing non-contrast steady-state free precession renal MRA imaging for assessing live donors? A preliminary study. Br J Radiol 2012; 85:e448-54. [PMID: 22253354 DOI: 10.1259/bjr/16270927] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
OBJECTIVE Accurate pre-operative evaluation of renal vascular anatomy is essential for successful renal harvest in live donor transplantation. Non-contrast renal MR angiographic (MRA) techniques are potentially well suited to the screening of donors; however, their restricted imaging field of view (FOV) has previously been an important limitation. We sought to assess whether the addition of a large FOV balanced fast field echo (BFFE) steady-state free precession (SSFP) sequence to non-contrast SSFP MRA could overcome this problem. Comparison with contrast-enhanced MRA (CE MRA) and findings at surgery were performed. METHODS 22 potential renal donors each underwent SSFP and CE MRA. 11 out of 22 potential donors subsequently underwent a donor nephrectomy. RESULTS All images were diagnostic. Both SSFP MRA and CE MRA identified an equal number of arteries. Surgery confirmed two accessory renal arteries, both demonstrated with both imaging techniques. A third accessory vessel was identified with both techniques on a kidney contralateral to the donated organ. 6 out of 11 procured kidneys demonstrated early branch arteries at surgery, 5 out of 6 of which had been depicted on both SSFP and CE MRA. The median grading of image quality for main renal arteries was slightly better for CE MRA (p=0.048), but for accessory vessels it was better for SSFP MRA. CONCLUSION This pilot study indicates that by combining free-breathing SSFP MRA with large-FOV bFFE images, an accurate depiction of renal vascular anatomy without the need for intravenous contrast administration can be obtained, as compared with surgical findings and CE MRA.
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Affiliation(s)
- I Laurence
- Radiology Department, Royal United Hospital, Bath, UK.
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Bazeed MF, Fooshang FF, Ahmed MA. Low-radiation-dose dual-phase MDCT protocol with split contrast media dose and time optimization: protocol design for renal donors evaluation. Acta Radiol 2011; 52:927-32. [PMID: 21873506 DOI: 10.1258/ar.2011.110286] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
BACKGROUND A routine, multiphase, computed tomography (CT) protocol is associated with high radiation exposure to potential kidney donors. To reduce radiation exposure, several authors have suggested a reduction in the number of phases. PURPOSE To evaluate a low-radiation-dose, dual-phase protocol (i.e. a protocol with an unenhanced phase and combined vascular and excretory phase) for the preoperative evaluation of potential renal donors. MATERIAL AND METHODS Sixty-five potential renal donors were divided into two groups. The first group was scanned with a routine quadric-phase protocol (non-contrast, arterial, venous, and delayed), and the second group was scanned with a triple-phase protocol (dual phase protocol + venous phase). In the second group, we replaced CT angiography with a routine abdominal CT technique. In addition to the evaluation of renal arteries, veins, and excretory systems, the radiation dose of the suggested protocol was compared to that of the routine quadric-phase protocol. RESULTS The suggested protocol was efficient in the evaluation of renal arteries, veins, and excretory systems in all studied potential renal donors. Renal arteries were well visualized in the combined vascular excretory phase using the routine abdominal CT technique; no significant difference was noted when these results were compared to those obtained from the CT angiography used in the quadric-phase protocol. The mean effective radiation dose of our suggested dual-phase protocol was only 34% of the dose resulting from the routine quadric-phase protocol. CONCLUSION Use of a low-radiation, dual-phase, CT protocol, which relied on both an unenhanced phase and a combined vascular and excretory phase, significantly reduced radiation dose. Furthermore, the proposed protocol provides adequate visualization of renal arteries and veins, and affords sufficient opacification of the urinary tract using improved acquisition triggering.
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Affiliation(s)
- Mohamed Fayez Bazeed
- Department of Diagnostic Radiology, Faculty of Medicine, Mansoura University, Egypt
| | | | - Magdy Aly Ahmed
- Nephrology Department, Armed Forces Hospitals Southern Region, Saudia Arabia
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Kulkarni S, Emre S, Arvelakis A, Asch W, Bia M, Formica R, Israel G. Multidetector CT angiography in living donor renal transplantation: accuracy and discrepancies in right venous anatomy. Clin Transplant 2011; 25:77-82. [PMID: 20070320 DOI: 10.1111/j.1399-0012.2009.01193.x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- S Kulkarni
- Department of Surgery, Section of Organ Transplantation & Immunology, Yale University School of Medicine, New Haven, CT 06410, USA.
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Arvin-Berod A, Bricault I, Terrier N, Skowron O, Cadi P, Boillot B, Thuillier C, Cluze C, Descotes JL, Rambeaud JJ, Long JA. Évaluation préopératoire du nombre de vaisseaux chez le donneur de rein vivant. La TDM est-elle supérieure à l’IRM ? Prog Urol 2011; 21:34-9. [DOI: 10.1016/j.purol.2010.05.013] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2010] [Revised: 05/14/2010] [Accepted: 05/26/2010] [Indexed: 11/25/2022]
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Abstract
Although catheter angiography remains the accepted gold standard for imaging of the renal vascular system, rapid progress in cross-sectional imaging techniques has caused a paradigm shift in many diagnostic algorithms toward noninvasive techniques such as computed tomographic angiography (CTA). CTA's cross-sectional imaging techniques provide an opportunity for comprehensive renal investigation that would be impossible with angiography alone. While other competing noninvasive technologies such as ultrasound and magnetic resonance angiography can be used successfully in renal imaging, the benefits of CTA are substantial, including high spatial and temporal resolution, widespread availability, implantable device compatibility, and easy technical reproducibility. This article describes the technical considerations relevant to CTA of the renal vascular system, postprocessing algorithms for volumetric data, and numerous specific applications.
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Affiliation(s)
- Peter S Liu
- Department of Radiology, University of Michigan Medical Center, Ann Arbor, MI 48109-0030, USA.
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Knox MK, Rivers-Bowerman MD, Bardgett HP, Cowan NC. Multidetector computed tomography with triple-bolus contrast medium administration protocol for preoperative anatomical and functional assessment of potential living renal donors. Eur Radiol 2010; 20:2590-9. [PMID: 20582545 DOI: 10.1007/s00330-010-1855-y] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2009] [Revised: 05/16/2010] [Accepted: 05/20/2010] [Indexed: 10/19/2022]
Abstract
OBJECTIVE To evaluate multidetector computed tomography (MDCT) with a triple-bolus contrast administration protocol for preoperative anatomical and functional assessment of living renal donors. METHODS Fifty-five potential living renal donors underwent MDCT of which 27 proceeded to donor nephrectomy. A triple-bolus contrast administration protocol was used for simultaneous acquisition of arterial, nephrographic, and excretory phases. MDCT images were independently reviewed in random order by two radiologists blinded to surgical anatomy findings. Diagnostic accuracy for anatomical variants was quantified by sensitivity and specificity. Differential renal function (DRF) was derived from MDCT for 54 patients and compared with technetium-99 m dimercaptosuccinic acid renography (Tc-99 m DMSA). RESULTS All triple-bolus MDCT examinations were technically adequate. Accessory renal arteries and veins were identified at surgery in 33% (n = 9/27) and 22% (n = 6/27) of donor kidneys. The mean difference between MDCT-derived DRF and DMSA was 0.8% (95% CI 0.1-1.6) with 95% limits of agreement of -4.6% (95% CI -3.3 to -5.9) to 6.3% (95% CI 5.0-7.6). MDCT delivered a mean (SD, range) radiation dose of 9.5 (3.6, 3.6-17.3) mSv. CONCLUSION MDCT with a triple-bolus contrast administration provides accurate anatomical and functional evaluation of living renal donors.
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Affiliation(s)
- Matthew K Knox
- Faculty of Medicine, UME Office, Health Sciences Centre, University of Calgary, 3330 Hospital Drive NW, Calgary, Alberta, Canada T2N 4N1
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Kumar S, Neyaz Z, Gupta A. The utility of 64 channel multidetector CT angiography for evaluating the renal vascular anatomy and possible variations: a pictorial essay. Korean J Radiol 2010; 11:346-54. [PMID: 20461189 PMCID: PMC2864862 DOI: 10.3348/kjr.2010.11.3.346] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2009] [Accepted: 02/02/2010] [Indexed: 11/24/2022] Open
Abstract
The increased use of laparoscopic nephrectomy and nephron-sparing surgery has prompted the need for a more detailed radiological evaluation of the renal vascular anatomy. Multidetector CT angiography is a fast and accurate modality for assessing the precise anatomy of the renal vessels. In this pictorial review, we present the multidetector CT angiography appearances of the normal renal vascular anatomy and a spectrum of various anomalies that require accurate vascular depiction before undergoing surgical treatment.
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Affiliation(s)
- Sheo Kumar
- Department of Radiodiagnosis, Sanjay Gandhi Post Graduate Institute of Medical Sciences, Lucknow, Uttar Pradesh, India
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Combined Vascular–Excretory Phase MDCT Angiography in the Preoperative Evaluation of Renal Donors. AJR Am J Roentgenol 2010; 194:145-50. [DOI: 10.2214/ajr.08.1999] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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