Patient: A 3-year-old child with a juxtaposition of the middle ring finger on both hands, with 2 phalanges proximally and a common middle and distal phalanges, and a curved index finger corrected. The curved index finger was corrected. The first surgery will separate the middle finger from the ring finger, and after a period of time, maybe six months or a year, the second surgery will reconstruct the missing middle and distal ring finger, as long as it does not affect the existing function, that is, the key is the first surgery to separate the middle finger from the ring finger will affect the existing development and function of the middle ring finger? Will the osteochondral scales be damaged? Han Dong, Hand Surgery Department, Shanghai Huashan Hospital: According to the x-ray, the proximal phalanx of the middle ring finger is articulated with the distal phalanx. Therefore, the proximal articular surface of the middle phalanx is different from the normal one. The joint surface of the middle and proximal phalanges are mismatched and lack the ulnar collateral bundle and lateral collateral ligaments, making the joint extremely unstable. The condition of the tendon is also unknown, so it is impossible to determine whether the middle finger will be fully functional after the split. The question of whether the growth will be affected. As I mentioned earlier, because of the mismatch between the articular surfaces, if you want to split the finger, you need to fix it with a Kristen pin after splitting. Therefore, caution is needed when choosing this type of surgery. The above content is for reference only.