title: Effect of bladder carcinoma location on detection rates by ultrasonography and computed tomography.
abstract: OBJECTIVE
  To evaluate the effect of the location of bladder carcinoma on detection rates by ultrasonography (US) and computed tomography (CT).
  
  
  METHODS
  The study included 85 patients with bladder cancer who were examined by US and CT before cystoscopy. The bladder wall was divided into 13 separate regions, and the tumor detection rates by US and CT were calculated for each location and lesion diameter with regard to the cystoscopy findings.
  
  
  RESULTS
  A total of 214 bladder tumors were detected at cystoscopy. The lowest detection rate for US was noted for the anteroinferior region (47%) of the bladder. The lowest detection rate for CT was also noted for the same region (55.5%). The detection rate of all anterior wall tumors by US and CT was 48.27% and 62.5%, respectively. The detection rate by CT was 100% for tumors greater than 5 mm in diameter. The greatest detection rates by both of the imaging modalities were for the bilateral side walls of the bladder.
  
  
  CONCLUSIONS
  The results of this study suggest that bladder tumor location highly affects the detection rates by US and CT. The lowest detection rates by both modalities were noted for anterior wall tumors. Because of the lower detection rate of tumors located in the anterior wall of bladder and those smaller than 5 mm, we recommend cystoscopy whenever a bladder tumor is suspected.
authors.affiliation: Department of Urology, University of Ankara, School of Medicine, Ankara, Turkey.
authors.forename: Eriz
authors.initials: E
authors.lastname: Ozden
authors.forename: Ahmet Tuncay
authors.initials: AT
authors.lastname: Turgut
authors.forename: Kadir
authors.initials: K
authors.lastname: Turkolmez
authors.forename: Berkan
authors.initials: B
authors.lastname: Resorlu
authors.forename: Mut
authors.initials: M
authors.lastname: Safak
mesh_terms: D002277:Carcinoma / Q000175:diagnosis / Q000000981:diagnostic imaging*; D003558:Cystoscopy; D005260:Female; D006801:Humans; D008297:Male; D009367:Neoplasm Staging; D015203:Reproducibility of Results; D012189:Retrospective Studies; D012680:Sensitivity and Specificity; D014057:Tomography, X-Ray Computed / Q000379:methods; D018608:Ultrasonography, Doppler / Q000379:methods; D001749:Urinary Bladder Neoplasms / Q000175:diagnosis / Q000000981:diagnostic imaging*