 In especially severe cases of OFC , parathyroidectomy , or the full removal of the parathyroid glands , is the chosen route of treatment . Parathyroidectomy has been shown to result in the reversal of bone resorption and the complete regression of brown tumors . In situations where parathyroid carcinoma is present , surgery to remove the tumors has also led to the regression of hyperparathyroidism as well as the symptoms of OFC . 
