Emergency parathyroidectomy effected a successful cure of a patient with severe hypercalcemia due to acute hyperparathyroidism. This patient experienced a spontaneous remission of probable acute hyperparathyroidism nine months prior to surgery. It is noted that painful hemorrhage into a parathyroid adenoma coincident with the clinical symptoms of acute hypercalcemia is exceedingly rare.
DeGroote JW. Acute Intermittent Hyperparathyroidism With Hemorrhage Into a Parathyroid Adenoma. JAMA. 1969;208(11):2160–2161. doi:10.1001/jama.1969.03160110132027