[Endocrine tumor of the pancreas--a case report on the differential diagnosis of cystic epigastric tumors].

This is a case report on a 21-year old woman patient having an asymptomatic, mainly cystic tumour of 25 cm size. Microscopic examination after removal revealed a tumour belonging to the APUD cell system. The clinical symptoms and pathology of this unusually large tumour are discussed.