A common cause of Primary hyperparathyroidism is:: (A) Multiple parathyroid adenomas, (B) Solitary parathyroid adenoma, (C) Adrenal hyperplasia, (D) Ectopic PTH production
Answer is B. Answer is B (Solitary parathyroid adenoma) : The most common cause of primary hyperparathyroidism is a parathyroid adenoma. A single/solitary abnormal gland is the cause in approximately 80% of patients - Harrison The abnormality of the gland is usually a benign neoplasm or 'adenoma' and rarely a parathyroid carcinoma