Long term effects of human growth hormone on 1,959 patients with pituitary dwarfism throughout Japan.

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Abstract
The results of 6 mo. to 8 yr of treatment of pituitary dwarfism in 1959 patients in Japan were summarized. The data were based on the reports of the physicians treating the patients. Among the patients, 1720 cases suffered from idiopathic pituitary dwarfism, 227 cases from secondary pituitary dwarfism and 12 cases from unknown causes. Their initial age ranged from 9 mo. to 36 yr old and their initial bone age ranged from 3 mo. to 15 yr old. In most cases, a definite effect was observed. The effect was most remarkable during the initial 6 mo. and then declined gradually up to the 4th yr. Males responded better than females. In younger and more immature patients, the effect was more remarkable. There were almost no side effects other than a few cases of impairment of capital femoral epiphysis.