[Transitory pseudohypoparathyroidism in the newborn infant]

This is a report on two young infants suffering from transitory pseudohypoparathyroidism. Therapy with vitamin D in high doses was not helpful but metabolic changes were promptly corrected by the administration of 1.25-(OH)2-D3 (Rocaltrol). The typical pretreatment findings were: hypocalcemia, hyperphosphatemia, reduced clearance of phosphate. Parathormone in serum was normal. Treatment with 0.25 and 0.5 micro-Gram 1.25-(OH)2-D3 respectively resulted in prompt correction of serum calcium- and serum-phosphate-changes. The observation of the urinary-cAMP-excretion during the course of the disease enables one to differentiate between the permanent and the transient form of the disease: values reaching 5-10 nmol/mg Creatinine indicate the time when treatment can be discontinued in the transitory form.