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': 'Which one of the following features is NOT associated with 1° hyperparathyroidism? \nSelect and explain. \nA. Giant cell tumour, B. Sharply defined radiolucencies of maxilla and mandible, C. Partial loss of lamina dura, D. Hypercementosis', 'role': 'user'}, {'content': "Answer: D \nExplanation: Radiographic features of hyperparathyroidism:\nThe radiographic findings in this\xa0disease are of particular importance. The bones of affected\xa0persons show a general radiolucency as compared with those\xa0of normal people. Later, sharply defined round or oval radiolucent areas develop, which may be lobulated. If such a lobulated lesion develops in the mandible, it must be\xa0carefully differentiated from ameloblastoma, which frequently has the same appearance.\nSmall cystic areas may be seen in the calvarium, and large\xa0and/or small sharply defined radiolucencies may be present in\xa0the maxilla and/or mandible. These small cystic\xa0areas must be differentiated from the lesions of multiple myeloma and eosinophilic granuloma. In this jaws, the bone radiograph in hyperparathyroidism has been described as having a 'ground-glass' appearance. The lamina dura around the teeth may be partially lost.\nHypercementosis is not seen in primary hyperparathyroidism.", 'role': 'assistant'}]