title: Suspected deep venous thrombosis: is US of both legs necessary? [ comment].
abstract: OBJECTIVE
  The first purpose was to test the assumption that ultrasound (US) examination of the asymptomatic leg was unnecessary. The second was to confirm the absence of deep venous thrombosis (DVT) in patients with bilateral symptoms.
  
  
  METHODS
  Four hundred eighty-eight patients were evaluated at a peripheral vascular laboratory for signs and symptoms of DVT. All patients then underwent bilateral color Doppler US of their leg veins.
  
  
  RESULTS
  Ninety-four patients had no lower extremity symptoms. Of these, 73 had no DVT, 11 had unilateral DVT, and 10 had bilateral DVT. Of 245 patients with unilateral symptoms, 180 had no DVT, 44 had ipsilateral DVT, three had contralateral DVT, and 18 had bilateral DVT. Of 149 patients with bilateral symptoms, 114 had no DVT, 10 had unilateral DVT, and 25 had bilateral DVT.
  
  
  CONCLUSIONS
  The frequent finding of bilateral DVT and unsuspected contralateral DVT in patients with unilateral symptoms, and the even more frequent finding of DVT in patients with bilateral symptoms, clearly indicates that both categories of patients need to be evaluated with bilateral US.
authors.affiliation: Department of Radiology, North Shore University Hospital, Manhasset, NY 11030, USA.
authors.forename: J B
authors.initials: JB
authors.lastname: Naidich
authors.forename: J R
authors.initials: JR
authors.lastname: Torre
authors.forename: J S
authors.initials: JS
authors.lastname: Pellerito
authors.forename: I S
authors.initials: IS
authors.lastname: Smalberg
authors.forename: D J
authors.initials: DJ
authors.lastname: Kase
authors.forename: K S
authors.initials: KS
authors.lastname: Crystal
mesh_terms: D005260:Female; D006801:Humans; D007866:Leg / Q000098:blood supply; D008297:Male; D008875:Middle Aged; D011446:Prospective Studies; D012307:Risk Factors; D013924:Thrombophlebitis / Q000000981:diagnostic imaging* / Q000453:epidemiology; D018615:Ultrasonography, Doppler, Color / Q000706:statistics & numerical data