First of all, we have to know that mirror image hand is a special kind of congenital polydactyly, although it seems to have extra fingers, but in reality it does not serve any purpose, without thumb function, it can only grasp objects within a certain range, and cannot grasp anything a little bit bigger, and it is impossible to write, unscrew the bottle cap, and some other actions. Therefore, when we treat mirror image hand, we not only need to remove the extra thumb, but also need to rebuild the thumb function for the affected hand, so that we can let the affected hand achieve the effect of almost normal hand after the operation. Although a baby with mirror image hand may look like he has a lot of fingers, he actually has only one chance to have surgery because the amount of skin, soft tissue, and bone tissue that can be used in surgery on the affected hand is limited. If you don’t get it right the first time, it will be very troublesome to have a second surgery to correct it, and the baby will also suffer a lot. Therefore, we must be rigorous and careful when choosing a surgical plan!