This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Miscellaneous, Subject name: Pathology
[{'content': 'A 42 yr old female was diagnosed with cystic neoplasm of pancreas containing ovarian-type stroma. She was most likely suffering from? \nSelect and explain. \nA. Mucinous cystadenoma, B. Serous cystadenoma, C. Solid Pseudopapillary neoplasm, D. Intraductal papillary mucinous neoplasm', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Diagnosis is Mucinous cystadenoma Most common cystic neoplasm of pancreas Up to 95% are seen in women Usually arise from the tail of pancreas Cystic cavities usually filled with thick mucinous material Columnar mucin-producing epithelium that lines the cysts is associated with a dense stroma similar to ovarian stroma Precursor to invasive carcinoma, up to 1/3rd are associated with invasive adenocarcinoma CECT showing peripheral egg shell calcification Surgical resection is curative for noninvasive mucinous cystic neoplasms (distal pancreatectomy).', 'role': 'assistant'}]