title: Prevalence and incidence of clinical symptoms of the retroaortic left renal vein.
abstract: OBJECTIVE
  To analyze the prevalence and incidence of clinical symptoms of retroaortic left renal vein (RLRV) diagnosed incidentally over 10 years by computed tomography (CT).
  
  
  METHODS
  7,929 consecutive patients (out- and inpatients) were studied with multidetector CT from January 2000 to April 2011. We retrospectively reviewed RLRV patients' medical records and analyzed their clinical characteristics.
  
  
  RESULTS
  A total of 61 out of 7,929 patients had a RLRV, therefore the prevalence was 0.77%. Only 4 of 61 (6.6%) RLRV patients diagnosed by CT scan were clinically symptomatic. RLRV was associated with flank pain and microhematuria in one patient (1.6%), in another one with microhematuria only and in one with ureteropelvic junction obstruction. Furthermore, one patient suffered from arterial hypertension associated with a RLRV.
  
  
  CONCLUSIONS
  RLRV is a rare finding, and only a small minority of RLRVs causes symptoms.
authors: Department of Urology, Landesklinik Weinviertel Mistelbach-Gänserndorf, Mistelbach, Austria.
authors: Stefan
authors: S
authors: Heidler
authors: Stephan
authors: S
authors: Hruby
authors: Stephan
authors: S
authors: Schwarz
authors: Yolanthe
authors: Y
authors: Sellner-Zwieauer
authors: Wolfgang
authors: W
authors: Hoeltl
authors: Walter
authors: W
authors: Albrecht
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001317:Austria / Q000453:epidemiology; D005260:Female; D021501:Flank Pain / Q000453:epidemiology; D006417:Hematuria / Q000453:epidemiology; D006801:Humans; D006973:Hypertension / Q000453:epidemiology; D015994:Incidence; D033162:Incidental Findings; D008297:Male; D008875:Middle Aged; D061330:Multidetector Computed Tomography; D011237:Predictive Value of Tests; D015995:Prevalence; D012082:Renal Veins / Q000002:abnormalities* / Q000000981:diagnostic imaging; D012189:Retrospective Studies; D014517:Ureteral Obstruction / Q000453:epidemiology; D014564:Urogenital Abnormalities / Q000000981:diagnostic imaging / Q000453:epidemiology*; D055815:Young Adult