| A rare condition with features of congenital ectrodactylous limb malformations associated with tibial aplasia or hypoplasia. The expression of the phenotype is highly variable and ranges from bilateral aplasia of tibiae and split-hand/split-foot deformity (tetramonodactyly or transverse hemimelia) to the mildest visible manifestation, hypoplastic big toes. Additional malformations may include distal hypoplasia or bifurcation of femora, hypo or aplasia of ulnae, and minor anomalies such as aplasia of patellae, postaxial and intermediate polydactyly in association with split-hand deformity, and cup-shaped ears. The syndrome is generally inherited in an autosomal dominant manner with reduced penetrance. |
