Parathyroid.com December 14, 2016[email protected] Join the Registry Learn more about: Hypocalciuric hypercalcemia- familial- type 1 Hyperparathyroidism- familial- primary Parathyroid.com is published and regularly maintained by the Norman Parathyroid Center, the world's leading parathyroid surgery center, to teach about hyperparathyroidism and the dangers of high blood calcium.