Patient: Hello! My son is just three years old. Half a month ago, I found a hard lump on the inner side of his left distal humerus when I touched him in the bath, and then went to the hospital to take an X-ray to confirm the diagnosis of osteochondroma. The tumor is about the size of a grain of grape. There was no pain and it did not affect the function of the arm. The internet says that it is best to wait until the epiphysis is closed before surgery to avoid affecting the child’s development. It is also said that the tumor is prone to recurrence if the surgery is done too young, and that the tumor will become malignant after recurrence. So I would like to ask the doctor is this really the case? When is the most appropriate time to operate on a tumor like my son’s? Is this kind of disease serious? Is it prone to recurrence? Is it necessary to do other tests besides X-ray? Doctor: 1. Surgery is not recommended at the age of 3. It is best when the epiphysis is closed, as osteochondroma usually stops growing when the child grows up. 2, need to pay attention to the follow-up observation, such as sudden increase or pain must go to the hospital. 3.Recurrence rate is very low. 4.In addition to x-ray, no other examination is usually needed without surgery.