Growth Hormone Therapy: a Panacea for Hypophosphatemic Rickets?† 406

Hypophosphatemic rickets with hypercalciuria.

Hereditary hypophosphatemic rickets

Hereditary hypophosphatemic rickets (HHR) are a group of diseases characterized by renal phosphate wasting causing growth retardation, rickets and osteomalacia. The most common form is the X-linked dominant hypophosphatemic rickets caused by inactivating mutations in the PHEX gene. The other hereditary hypophosphatemic syndromes present a lower prevalence. These include autosomal dominant hypop...

Hypophosphatemic rickets and osteomalacia.

The hypophosphatemic conditions that interfere in bone mineralization comprise many hereditary or acquired diseases, all of them sharing the same pathophysiologic mechanism: reduction in the phosphate reabsorption by the renal tubuli. This process leads to chronic hyperphosphaturia and hypophosphatemia, associated with inappropriately normal or low levels of calcitriol, causing osteomalacia or ...

Serum parathyroid hormone in hypophosphatemic vitamin D-resistant rickets.

Serum parathyroid hormone (PTH) was measured in five children with untreated, active hypophosphatemic vitamin D-resistant rickets be[ore, during, and after an in[usion o[ calcium. During the calcium in[usion, serum PTH decreased while the tubular resorption of phosphate increased. Although these data clearly indicate that some degree o[ hyperparathyroidism accompanies the disease, it is apparen...

Tertiary hyperparathyroidism during high phosphate therapy of familial hypophosphatemic rickets.

We report the development of severe tertiary hyperparathyroidism in three girls treated for familial hypophosphatemic rickets and characterize parathyroid function in vivo and in vitro. All patients had been previously treated with relatively large doses of inorganic phosphorus (125 mm/day) and ergocalciferol or calcitriol for several years and had radiographic evidence of long-standing hyperpa...