The new syndrome of congenital hypoparathyroidism associated with dysmorphism, growth retardation, and developmental delay--a report of six patients.

We describe six children of Arab origin with a syndrome of congenital hypoparathyroidism, severe growth retardation, developmental delay, and dysmorphism. The most prominent dysmorphic features were microcephaly, facial and dental anomalies, and small hands and feet. Bone age was markedly retarded. Neither immunological nor chromosomal abnormalities were found. Insulin-like growth factor-1 serum levels, measured in two patients, were abnormally low.