<prompt> Which is the MOST common surgically repairable cause of hyperparathyroidism?AdenomaCarcinomaHyperplasiaRenal disease  <response>: Primary hyperparathyroidism is a surgical disease and operation is required for the hyperfunctioning gland. A single hyperfunctioning adenoma accounts for approximately 80 cases. Multiple adenoma or hyperplasia account for 15-20 and parathyroid carcinoma account for 1 cases of hyperparathyroidism. 