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: Radiology
[{'content': 'Spongy appearance with central sunburst calcification is seen in – \nSelect and explain. \nA. Pancreatic adenocarcinoma, B. Mutinous cyst adenocarcinomas, C. Somatostatinoma, D. Serous cystadenoma', 'role': 'user'}, {'content': 'Answer: D \nExplanation: "The serous cystadenoma, or microcystic adenoma, is a benign tumor of elderly women, presenting with vague\xa0abdominal symptoms. A large calcified mass is often seen, with the calcification having a characteristic sunburst\xa0pattern within a central fibrotic scar".', 'role': 'assistant'}]