Abstract
1. A family study of sixty-one children with infantile idiopathic scoliosis to determine the relationship of other developmental anomalies to the behaviour of the curve is reported. 2. Of the thirty-nine children with resolving curves only one had another defect. 3. Twelve out of twenty-two children with non-resolving curves had at least one other developmental anomaly. 4. The presence of such defects may indicate that the curve is likely to progress.