前立腺癌における経直腸的針生検の評価

Abstract

Digital examination is a more essential diagnostic method for prostatic disorders and the result obtained is a very important factor for deciding stage of prostatic cancer, too. We performed 108 times transrectal needle biopsy of the prostate in 75 cases during 11 years since 1968 and reviewed them in comparison with digital findings. Accurate rate by digital examination was 72%. The biopsy revealed more extensive cancer than digital findings frequently. In 20 out of T1 and T2 28 cases, the stage should be altered to higher level and in 17 of these, the advanced stage should be considered beyond the prostatic capsule (60.7%). The complication rate was 6.5% being not much higher than previous reports. Possibility of disagreement between digital findings and histopathological diagnosis by needle biopsy should be considered in deciding the stage of the prostatic cancer in order to avoid underestimation in the clinical examinations, which is very common. When a needle biopsy or the prostate is performed, several specimens must be obtained from the suspicious as well as randomly selected areas.