A pancreatic-polypeptide-producing tumor of the stomach.

A gastric tumor was found in a 64-year-old woman who later developed flushing, tachycardia, headache, and lacrymation. The plasma pancreatic polypeptide (PP) level was 700 times normal values, and the majority of the tumor cells were immunoreactive to PP antiserum. Symptoms were alleviated, and PP levels fell after embolization of the hepatic artery for liver metastases. This is the first reported case of gastric PP-producing endocrine tumor.