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': 'Psammoma bodies are seen in all except ? \nSelect and explain. \nA. Seminaoma, B. Meningioma, C. Pappilary carcinoma of thyroid, D. Pappilary serous cystadenocarcinoma of the ovary', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Seminoma Psammoma bodies represent a process of dystrophic calcification. Single necrotic cells may constitute seed crystals that become encrusted by the mineral deposits. The progressive acquisition of outer layers may create lamellated configurations, called psammoma bodies because of their resemblance to grains of sand. Psammoma bodies are seen in : Papillary cancer of thyroid Meningioma Papillary serous cystadenocarcinoma of ovary", 'role': 'assistant'}]