Brachyphalangy, Polydactyly, and Tibial Aplasia/hypoplasia is related to polydactyly, preaxial i and polydactyly. An important gene associated with Brachyphalangy, Polydactyly, and Tibial Aplasia/hypoplasia is HMGB1 (High Mobility Group Box 1). Affiliated tissues include kidney and skin, and related phenotypes are ptosis and high palate