Multiple exostotic hypochondroplasia: syndrome of combined hypochondroplasia and multiple exostoses.

This is a report of a family with major focus on the daughter who was of short stature. The mother had hypochondroplasia and the father had multiple exostoses. The daughter's skeletal roentgenograms show features of both hypochondroplasia and multiple exostoses. The roentgenographic, clinical and genetic aspects of these skeletal dysplasias are reviewed and hypochondroplasia is contrasted with achondroplasia. The genetic and counseling implications of the association of hypochondroplasia and multiple exostoses are discussed.