Parathyroid.com December 14, 2016nisha.kabra@checkorphan.org Join the Registry Learn more about: Hypocalciuric hypercalcemia- familial- type 3 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.