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Syndactyly Symptoms and Causes

Syndactyly is the most common congenital hand deformity, in which two or more fingers are fused together. According to some sources, this condition occurs in about three out of every 10,000 live births. There is a familial tendency to develop this deformity. This deformity usually involves both hands, and males are more often affected than females. If the fingers are completely fused together, it is considered complete. There are two types of syndactyly, including the following:

  • Simple syndactyly — involves fusion between only the tissues of the fingers
  • Complex syndactyly — involves fusion between the bones