Hypoplastic clavicles and lateral scapular redirection.

Three patients with bilateral hypoplastic clavicles and anterolateral displacement of the shoulders and scapulas on the thoracic cage are described. One patient had no family history of the disorder. The mother of the other patient had the same condition, suggesting an autosomal dominant inheritance pattern. In all three patients, the clavicle was underdeveloped and the scapula was redirected onto the lateral rather than the posterior thorax, bringing the entire shoulder forward. None of the patients have any significant functional restriction.