Carcinoma of the Prostate Presenting as Disease of the Rectum

SUMMARY 1. Sixteen cases of carcinoma of the prostate which presented as disease of the rectum are described. 2. They are divided into three clinical types: rectal stricture; anterior submucous mass; rectal ulcer. 3. The importance of differentiating advanced carcinoma of the rectum from carcinoma of the prostate invading the rectum is stressed because of the different forms of treatment. 4. The methods of diagnosis are discussed and emphasis is placed on the value of rectal biopsy. 5. The difficulties of distinguishing between the histological diagnosis of anaplastic prostatic and anaplastic rectal carcinoma are discussed. 6. The follow‐up results of thirteen patients are described.