title: Difference of cancer core distribution between first and repeat biopsy: In patients diagnosed by extensive transperineal ultrasound guided template prostate biopsy.
abstract: BACKGROUND
  We performed extensive transperineal ultrasound guided template prostate biopsy and evaluated cancer core distribution.
  
  
  METHODS
  From August 2000 to May 2002, 113 men with prostate specific antigen levels between 4.0 and 10.0 ng/ml underwent template biopsy. Eighty-six had no previous biopsy (first group) and 27 had previous transrectal sextant biopsies (repeat group). A mean of 18.4 biopsy cores were taken. We defined the region over 2 cm from the rectal face of the prostate as the anterior region and the other as the posterior.
  
  
  RESULTS
  Cancer was detected in 49 of 113 (43%) men. Forty-two were in the first group and seven in the repeat group. In the first group, the cancer core rate (cancer core number/biopsy core number) in the anterior region (7.0%) had no difference from that in the posterior region (8.6%) (P = 0.7111). But in the repeat group, the cancer core rate in the anterior region (4.6%) was higher than in the posterior (1.5%) (P < 0.0001).
  
  
  CONCLUSIONS
  These results suggest that transrectal sextant biopsies miss more cancers in the anterior region than in the posterior. We believe template technique has an advantage to be able to detect cancer equally in the anterior and posterior.
authors.affiliation: Department of Urology, Sapporo Kosei Hospital, Sapporo, Japan. tfuruno@cocoa.ocn.ne.jp
authors.forename: Tsuyoshi
authors.initials: T
authors.lastname: Furuno
authors.forename: Takayoshi
authors.initials: T
authors.lastname: Demura
authors.forename: Tatsuo
authors.initials: T
authors.lastname: Kaneta
authors.forename: Hiroko
authors.initials: H
authors.lastname: Gotoda
authors.forename: Shunji
authors.initials: S
authors.lastname: Muraoka
authors.forename: Toshihiro
authors.initials: T
authors.lastname: Sato
authors.forename: Satoshi
authors.initials: S
authors.lastname: Nagamori
authors.forename: Nobuo
authors.initials: N
authors.lastname: Shinohara
authors.forename: Tomohiko
authors.initials: T
authors.lastname: Koyanagi
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D001707:Biopsy, Needle / Q000379:methods*; D006801:Humans; D008297:Male; D008875:Middle Aged; D011237:Predictive Value of Tests; D017430:Prostate-Specific Antigen / Q000097:blood; D011471:Prostatic Neoplasms / Q000097:blood / Q000000981:diagnostic imaging / Q000473:pathology*; D014463:Ultrasonography / Q000379:methods*
chemical_list: D017430:Prostate-Specific Antigen