Familial hypocalciuric hypercalcemia (FHH) and neonatal severe hyperparathyroidism (NSHPT) are genetically determined variants of primary hyperparathyroidism. FHH usually has a benign course, and patients do not require treatment, whereas NSHPT… Click to show full abstract
Familial hypocalciuric hypercalcemia (FHH) and neonatal severe hyperparathyroidism (NSHPT) are genetically determined variants of primary hyperparathyroidism. FHH usually has a benign course, and patients do not require treatment, whereas NSHPT is a severe disorder often requiring early parathyroidectomy for young patients to survive. Recent discoveries in the genetic basis and new findings in therapeutic approaches have led to a great interest in these rare diseases.
               
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