title: Pancreatic choriocarcinoma presenting as inflammatory pseudocyst.
abstract: A primary pancreatic choriocarcinoma was discovered at surgery in a patient with a clinical diagnosis of pancreatic inflammatory pseudocyst. To our knowledge, this is the first example of an extragonadal choriocarcinoma reported as a primary at this site. We consider this neoplasm to be another example of a visceral choriocarcinoma arising from a primary carcinoma through a process of metaplasia. This case illustrates the inherent difficulties in the preoperative evaluation of cystic lesions of the pancreas, and the importance of recognizing endocrinologic manifestations of malignant disease.
mesh_terms: D000328:Adult; D001706:Biopsy; D002822:Choriocarcinoma / Q000175:diagnosis* / Q000473:pathology / Q000648:ultrastructure; D003937:Diagnosis, Differential; D006801:Humans; D008297:Male; D010181:Pancreatic Cyst / Q000175:diagnosis*; D010190:Pancreatic Neoplasms / Q000175:diagnosis* / Q000473:pathology / Q000648:ultrastructure; D010192:Pancreatic Pseudocyst / Q000175:diagnosis*; D010195:Pancreatitis / Q000175:diagnosis / Q000473:pathology; D014463:Ultrasonography