title: [Transrectal ultrasound examination of the prostate in 100 cases of prostate cancer].
abstract: OBJECTIVE
  To evaluate the clinical value of transrectal ultrasound (TRUS) examination of the prostate in the diagnosis of prostate cancer (PCA).
  
  
  METHODS
  The sonographic and clinical data of 100 patients with PCA were analyzed retrospectively.
  
  
  RESULTS
  There was single lesion in 59 patients, diffuse lesion in 17 patients. The size of tumor in 35 patients was < or = 1.5 cm. TRUS in the diagnosis of PCA had an accuracy of 76.0%, specificity of 89.4%, false positive rate of 10.6% and negative predictive value of 88.9%. The level of prostate specific antigen (PSA) increased with the increase in the size of the tumor (P < 0.05). The PSA level of patients with poorly differentiated PCA was significantly higher than that in patients with well differentiated PCA.
  
  
  CONCLUSIONS
  TRUS examination is a convenient procedure for the diagnosis of PCA in its early stage.
authors.affiliation: Department of Ultrasound, Chinese PLA General Hospital, Beijing 100853, China.
authors.forename: J
authors.initials: J
authors.lastname: Tang
authors.forename: S
authors.initials: S
authors.lastname: Li
authors.forename: J
authors.initials: J
authors.lastname: Xu
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D006801:Humans; D008297:Male; D008875:Middle Aged; D017430:Prostate-Specific Antigen / Q000378:metabolism; D011471:Prostatic Neoplasms / Q000000981:diagnostic imaging* / Q000378:metabolism; D012007:Rectum / Q000000981:diagnostic imaging; D012189:Retrospective Studies; D012680:Sensitivity and Specificity; D014463:Ultrasonography
chemical_list: D017430:Prostate-Specific Antigen