Gastric mucosal metastasis from primary colorectal carcinoma.

A 44-year-old man with a background of metastatic colorectal cancer presented with haematemesis. An oesophago-gastroduodenoscopy was performed and revealed five focally haemorrhagic grey mucosal lesions in the body and fundus regions of the stomach between 5 mm and 4 mm in diameter. The biopsies of the gastric mucosal lesions showed invasive poorly differentiated adenocarcinoma in which signet ring cells were a prominent component, thus related to the primary cancer. The background mucosa showed no dysplasia.