This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Breast, Subject name: Pathology
[{'content': 'Brown tumor of bone is seen in \nSelect and explain. \nA. Hyperparathyroidism, B. Hypoparathyroidism, C. Hypo-thyroidism, D. Hypehyroidism', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Primary hyperparathyroidism traditionally has been associated with a constellation of symptoms that included painful bones. Brown tumors are lesions that arises in settings of excess osteoclast activity. It is not a true neoplasm.It most commonly affects the maxilla and mandible, though any bone may be affected. Brown tumours are radiolucent on x-ray. Robbins basic pathology 9th edition page no 737,Yellow box (morphology) Brown tumors of hyperparathyroidism.', 'role': 'assistant'}]