This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pathology
[{'content': 'Intraductal papillary mucin neoplasm is a precursor of- \nSelect and explain. \nA. Mucinous cystic neoplasm, B. Mucinous non-cystic neoplasm, C. Ductal adenocarcinoma, D. Solid pseudopapillary neoplasm', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Intraductal papillary mucinous neoplasm (IPMN) \n\nIPMN is a papillary neoplasm that arises within the main pancreatic duct (MPD) or its branches.\nIPMN is characterized by\n\n\nIntraductal, papillomatous growth pattern\nExcessive mucin secretion\nExcessive mucin secretion results in progressive ductal dilatation and cyst formation\n\n\nIPMNs are most commonly localized to the head of the pancreas, but they may occur at any site along the pancreatic ductal system.\nIPMTs are premalignant and may histologically demonstrate areas ranging from hyperplasia to carcinoma within a single tumor.\nIPMTs which is positive for MUG 2 (Intestinal-type secretory mucin) may form an adenocarcinoma (ductal adenocarcinoma).', 'role': 'assistant'}]