Abstract
Two cases of primary adenocarcinoma in the urinary bladder were reported. The first case was 61-years-old female who had about thumb tip sized tumor at posterior wall of the urinary bladder showing intestinal type of adenocarcinoma with prominent mucin production. Many signet ring cells were found in muconodular lesion. Cystitis glandularis was seen in non-tumorous mucosa of the urinary bladder. Histogenesis of this cancer was suspected of glandular metaplasia in urothelium.
The second was 79-years-old male who had little finger tip sized, infiltrating carcinoma at lateral wall of urinary bladder and followed recurrence. Histological examination revealed poorly differentiated adenocarcinoma without prominent mucin production. A part of this cancer showed the pattern of embryonal carcinoma and also transitional cell carcinoma. Regarding of histogenesis, tissue malformation in urinary bladder was rather suggested than glandular metaplasia. Urachal origin was denied in both cases because of localization.
