title: The role of color duplex sonography in the diagnosis of giant cell arteritis.
abstract: OBJECTIVE
  To determine the clinical usefulness of color duplex sonography in the diagnosis of giant cell arteritis as an alternative to temporal artery biopsy.
  
  
  METHODS
  From May 1998 to November 2002, 68 consecutive patients seen in our hospital with a clinical suggestion of active temporal arteritis were included. Forty-eight patients were female and 20 were male, with a mean age of 77 years. Color duplex sonography with a linear array transducer (5-10 MHz) was used to assess temporal artery morphologic characteristics before a biopsy was performed. The main sonographic criterion for a positive diagnosis was visualization of a hypoechoic halo around the temporal artery. These data were compared with pathologic findings. The kappa statistic was used to determine the level of agreement. Sensitivity, specificity, positive and negative predictive values, and accuracy of duplex sonography as a diagnostic test were assessed.
  
  
  RESULTS
  The color duplex sonographic findings were positive in 25 of 68 patients with a clinical suggestion of giant cell arteritis. The diagnosis was confirmed by biopsy in 22 patients; there were 4 false-positive results and 1 false-negative result by duplex sonography. The kappa value was 0.84. Sensitivity, specificity, positive and negative predictive values, and accuracy for duplex sonography were 95.4%, 91.3%, 84%, 97.6%, and 92.6%, respectively.
  
  
  CONCLUSIONS
  The use of high-resolution color duplex sonography may replace biopsy in the diagnosis of giant cell arteritis.
authors.affiliation: Department of Vascular Surgery, Hospital Universitari de Bellvitge, Feixa Llarga s/n L'Hospitalet Llobregat, 08907 Barcelona, Spain. 29072arv@comb.es
authors.forename: Antonio
authors.initials: A
authors.lastname: Romera-Villegas
authors.forename: Ramón
authors.initials: R
authors.lastname: Vila-Coll
authors.forename: Violant
authors.initials: V
authors.lastname: Poca-Dias
authors.forename: Marc A
authors.initials: MA
authors.lastname: Cairols-Castellote
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D005260:Female; D013700:Giant Cell Arteritis / Q000000981:diagnostic imaging*; D006801:Humans; D008297:Male; D008875:Middle Aged; D012680:Sensitivity and Specificity; D018615:Ultrasonography, Doppler, Color; D018616:Ultrasonography, Doppler, Duplex