“Doctor, my baby’s hand is cracked ……” Today, while I was responding to a private message in the background, I saw a photo sent by a fan friend of his baby. Have you ever seen a hand like this? The child’s right hand seems to be “split” in the middle, the palm “split” into two halves, this is a typical “split hand” deformity, is a rare congenital hand deformity. Split hand is often manifested as fingers and palm in the middle of the hand split into ulnar, radial two parts, and many accompanied by a few fingers, missing finger deformity, X-ray there are often fissures between the transverse rows of excess bone. “Why is this happening? What causes it?” Parents ask with great anxiety. Its etiology is still unclear, and some studies have suggested that it may be related to factors such as the environment, medications during pregnancy, and genetics, with genetic features often manifesting themselves in chromosomal structural abnormalities. “Why wasn’t it detected in the labor and delivery test?” The parents pressed again. In fact, congenital hand deformities, including split hand, are a dynamic process of development and growth, and cannot be detected by ultrasound when they have not developed to a certain stage or degree. In addition, the diagnostic accuracy and detection rate of numerous human structures are relatively low due to a variety of factors such as the thickness of the abdominal wall of the pregnant woman, the week of pregnancy, the position of the fetus, the development of the disease, and the limitations of the current technical conditions. “Can it be cured?” The parents finally asked. I believe this is also a question that many parents of affected children are concerned about. Clinical treatment of split hand, at present, is mainly through the crack repair and reconstruction of the finger web, ligament function, at the same time, open the tiger’s mouth, so as to improve the appearance and function, if there is a combination of other deformities, do the corresponding treatment. It is important to note that the primary consideration for surgery is the function of the child’s hand, followed by appearance. However, most of the parents or adult patients who come to the clinic “deliberately” pursue a cosmetic appearance, which may improve the appearance of the hand after surgery, but may cause a lot of obstacles in function. Once a child is born with a split hand deformity, it is important to receive treatment at the earliest possible time to avoid delaying the restoration of shape and function. It is generally recommended that the child can be operated at about 6 months of age, this period of time for surgery, the child’s bone recovery period is short; on the other hand, the child at this age is still not too sensible, the physical defects have not yet affected the child’s mental health.