1988 Volume 79 Issue 9 Pages 1529-1534
We examined operated prostate tissues from 573 patients who were diagnosed as having clinical benign prostatic hyperplasia and urinary bladder cancers.
1. 25 of the 573 patients (4.4%) were diagnosed as having incidental carcinoma. The patients with incidental carcinoma were an average of 73.8 years old, and the patients of BPH were an average of 69.5 years old. The former was significantly older than the latter (p<0.05). Incidental carcinoma did not increase in recent years.
2. By means of the step-section technique and examination of all TUR chips, the frequency of incidental carcinoma increased from 5.6% to 7.4%.
3. The tumor size was closely assosiated with the histological grade. Most large tumors were moderately or poorly differentiated adenocarcinoma. Well differentiated adenocarcinomas which were over 5mm in diameter, were mixed with moderately or poorly differentiated adenocarcinoma. More than 5 chips in TUR-P patients were diagnosed as moderately or poorly differentiated.
From the above results, we propose that stage A1 is the tumor size of less than 5mm and well differentiated adenocarcinoma, or less than 3 chips and well differentiated adenocarcinoma.
