title: Paucicellular infiltrating ductal carcinoma of pancreas: an unusual variant.
abstract: A 65-year-old man presented with obstructive jaundice from a 3-cm mass in the head of the pancreas. A Whipple resection was performed. Histologic examination of the tumor showed scanty tumor cells arranged in a single-file manner set within a desmoplastic sclerotic stroma. In other areas, the tumor was arranged around preexisting ducts in a targetoid fashion. Very focal ductal and signet-ring cell differentiation was noted. This unusual variant of pancreatic cancer was characterized by paucicellularity and a pattern of invasion resembling lobular carcinoma of breast.
authors.affiliation: Department of Pathology, University Health Network/Toronto Medical Laboratories, University of Toronto, Toronto, Canada M5G 2M9.
authors.forename: Mosa
authors.initials: M
authors.lastname: Fagih
authors.forename: Stefano
authors.initials: S
authors.lastname: Serra
authors.forename: Runjan
authors.initials: R
authors.lastname: Chetty
mesh_terms: D000199:Actins / Q000378:metabolism; D000368:Aged; D021441:Carcinoma, Pancreatic Ductal / Q000175:diagnosis / Q000378:metabolism / Q000473:pathology*; D003937:Diagnosis, Differential; D006801:Humans; D007633:Keratins / Q000378:metabolism; D008297:Male; D018396:Mucin-1 / Q000378:metabolism; D009361:Neoplasm Invasiveness / Q000473:pathology*; D010190:Pancreatic Neoplasms / Q000175:diagnosis / Q000378:metabolism / Q000473:pathology*
chemical_list: D000199:Actins; D018396:Mucin-1; D007633:Keratins