This disease becomes: polydactyly, also known as repeated fingers, refers to the redundant growth of fingers other than normal fingers, and the simple soft tissue components of phalanges or metacarpals of fingers. It is the most common congenital malformation of hand in clinic, accounting for about 39.9% (beam 1982) of congenital upper limb malformation, and its incidence rate is about1‰; The ratio of male to female is 3∶2, and the ratio of left and right hands is 2∶ 1. The incidence of thumb polydactyly accounts for about 10%, accounting for more than 90% of the total. This is a chromosomal disease, many of which are related to heredity. But this condition is one of the most common malformations in pediatrics.

There are three kinds of deformities: (1) the external soft tissue mass is not connected with bone, and there is no bone, joint or tendon; (2) It has all the conditions of fingers and is attached to 1 metacarpal or bifurcated metacarpal; (3) Complete exogenous fingers and metacarpals. According to different situations: you can do multi-finger plastic surgery.

Multi-fingering not only hinders the functional activities of the hand, but also affects the appearance. Polydactyly is usually 6 fingers deformity, sometimes bifurcated polydactyly can be seen. If the finger is only connected with soft tissue, it can be ligated by color line or surgically removed at any time after birth; If the fingers are connected with the bones, joints and tendons of political parties, they should be operated at the age of 6 ~ 7; Rectangular joint surgery is needed, and surgery can be performed after 12 years old.