Polydactyly

Polydactyly, also known as repetitive fingers, refers to the proliferation of fingers other than normal fingers, phalanges of the fingers, simple soft tissue components, or metacarpal bones. It is the most common clinical congenital malformation of the hand. The ratio of male to female is 3: 2, and the right hand is more than the left hand, the ratio is 2: 1. The incidence of both hands is about 10%, and the incidence of thumbs is more than 90%.

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