<prompt> All are TRUE about hyperparathyroidism, Except:Commonly occurs after thyroidectomyMay cause hypercalcemiaSolitary adenoma is the most common causeNone of the above  <response>: Answer is A Commonly occurs after thyroidectomy: Thyroidectomy may lead to hypoparathyroidism and not hyperparathyroidism due to inadveent removal of the parathyroid glands. 