title: Isolated pelvic deep venous thrombosis: relative frequency as detected with MR imaging.
abstract: OBJECTIVE
  To determine the relative frequency of deep venous thrombosis (DVT) isolated to the pelvic veins, as demonstrated with magnetic resonance (MR) imaging.
  
  
  METHODS
  The reports of 769 MR examinations performed from June 1993 through December 1999 in patients with suspected DVT were reviewed retrospectively. MR venography was performed by using a two-dimensional gradient-recalled-echo sequence (typically repetition time, 34 msec; echo time, 13 msec; flip angle, 60 degrees ). The presence of DVT was categorized by location in the pelvis, thigh, or calf.
  
  
  RESULTS
  DVT was identified in 167 (21.7%) of the 769 MR examinations. Thirty-four (20.4%) of the 167 studies demonstrated DVT isolated to the pelvic veins.
  
  
  CONCLUSIONS
  The relative frequency of isolated pelvic DVT detected with MR venography was higher than that reported in prior studies with ultrasonography (US) or ascending venography. MR venography should be performed in patients with suspected pelvic DVT or when clinical suspicion persists despite a negative US study.
authors.affiliation: Department of Radiology, Duke University Medical Center, Box 3808, MRI Section, Rm 1800, Durham, NC 27710, USA. chuck.spritzer@duke.edu
authors.forename: C E
authors.initials: CE
authors.lastname: Spritzer
authors.forename: M A
authors.initials: MA
authors.lastname: Arata
authors.forename: K S
authors.initials: KS
authors.lastname: Freed
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D002648:Child; D005260:Female; D005835:Genitalia / Q000098:blood supply; D006801:Humans; D007084:Iliac Vein / Q000000981:diagnostic imaging; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D010388:Pelvis / Q000098:blood supply* / Q000000981:diagnostic imaging; D011859:Radiography; D012189:Retrospective Studies; D018616:Ultrasonography, Doppler, Duplex; D014680:Veins / Q000000981:diagnostic imaging / Q000473:pathology; D014682:Vena Cava, Inferior / Q000000981:diagnostic imaging; D020246:Venous Thrombosis / Q000175:diagnosis* / Q000000981:diagnostic imaging