A common cause of Primary hyperparathyroidism is:
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
Multiple parathyroid adenomas
Solitary parathyroid adenoma
Adrenal hyperplasia
Ectopic PTH production