Synchronous occurrence of colon and appendiceal adenocarcinoma.

The study presented two cases of synchronous occurrence of colon and appendiceal adenocarcinoma. Both patients required surgical intervention, due to acute peritonitis during the course of acute appendicitis. In case of one patient we performed abdominal CT confirming the presence of sigmoid cancer. The patient was subjected to appendectomy and Hartmann's operation. The second patient underwent an appendectomy, and colonoscopy performed two months later revealed the presence of rectal adenocarcinoma. The patient was subjected to low anterior rectal resection. The histopathological results considering both patients revealed the presence of synchronous colon and appendiceal adenocarcinoma.