caa a22 4500 605494614 CHVBK 20210128100527.0 cr unu---uuuuu 210128e20151001xx s 000 0 eng 10.1007/s00261-015-0512-y doi (NATIONALLICENCE)springer-10.1007/s00261-015-0512-y Left renal vein compression as cause for varicocele: prevalence and associated findings on contrast-enhanced CT [Elektronische Daten] [Douglas Lewis, Lars Grimm, Charles Kim] Purpose: The purpose of this study is to determine the prevalence of left renal vein compression in patients with varicoceles. Methods: Abdominal and pelvis contrast-enhanced CT images from 100 male patients with varicoceles (mean age 50.6years) and 100 matched control patients (mean age 49.8years) were retrospectively reviewed. The diameter of the left renal vein was measured as it crosses between the aorta and superior mesenteric artery and was classified as compressed if there was greater than 50% narrowing. The diameter of the left gonadal vein was measured at the origin. Comparison of the prevalence of left renal vein compression was made via a Chi-squared test and the gonadal vein diameter via a t test. Results: The distribution of varicoceles was 68 on the left, 24 bilateral, and 8 on the right. Compression of the left renal vein was significantly more common in the left varicocele (78%, 53/68) than in the bilateral varicocele (42%, 10/24, p=0.002), right varicocele (13%, 1/8, p<0.001), or control group (10%, 10/100, p<0.001). In the subgroup analysis, the gonadal vein diameter was significantly greater in the left varicocele (mean 5.6mm) than in the bilateral varicocele (mean 4.6mm, p=0.018), right varicocele (mean 3.2mm, p<0.001), and control group (mean 3.1mm, p<0.001). Conclusion: Left renal vein compression by the superior mesenteric artery is a major contributor to left-sided varicoceles. Springer Science+Business Media New York, 2015 Varicocele nationallicence Renal vein nationallicence CT nationallicence Nutcracker nationallicence Gonadal vein nationallicence Superior mesenteric artery nationallicence Lewis Douglas Department of Radiology, Duke University Medical Center, Box 3808, 27710, Durham, NC, USA aut Grimm Lars Department of Radiology, Duke University Medical Center, Box 3808, 27710, Durham, NC, USA aut Kim Charles Department of Radiology, Duke University Medical Center, Box 3808, 27710, Durham, NC, USA aut Abdominal Imaging Springer US; http://www.springer-ny.com 40/8(2015-10-01), 3147-3151 0942-8925 40:8<3147 2015 40 261 https://doi.org/10.1007/s00261-015-0512-y text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s00261-015-0512-y text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Lewis Douglas Department of Radiology, Duke University Medical Center, Box 3808, 27710, Durham, NC, USA aut NATIONALLICENCE 700 1- Grimm Lars Department of Radiology, Duke University Medical Center, Box 3808, 27710, Durham, NC, USA aut NATIONALLICENCE 700 1- Kim Charles Department of Radiology, Duke University Medical Center, Box 3808, 27710, Durham, NC, USA aut NATIONALLICENCE 773 0- Abdominal Imaging Springer US; http://www.springer-ny.com 40/8(2015-10-01), 3147-3151 0942-8925 40:8<3147 2015 40 261