CLINICAL HISTORY.—This 1-year-old Oriental boy was seen because of his short stature and the appearance of having a large head.
According to the case history he was born two months prematurely and was delivered by breech extraction. The mother's pregnancy was otherwise uneventful. His birth weight was 5 lb (2,270 gm) and his length was 17 inches (43 cm). At 3 months of age he was smiling; and at 10 months he would reach for objects; and at 11 months he crawled and would hold his rattle. His height at 1 year of age was 26 inches (66 cm) and weight was 16 lb (7,264 gm).
The patient has two older siblings who are normal. The mother is 5 ft 1 inch (155 cm) tall; the maternal grandmother, 4 ft 10 inches (147 cm); and maternal uncle, 5 feet (152 cm) tall.
On examination the anterior fontanel was large and