Bone islands are benign changes during bone growth and development. They are not a disease, but a dense bone component in the bone marrow cavity or cancellous bone, generally speaking, the lesions are very small, less than 2 cm, and have no major impact on health or function, not a disease. If there is any serious effect on the bone island, it is when the location of the island is close to the cortex or around the stop of the periarticular ligament, it will produce corresponding compression symptoms, but the symptoms are usually not very serious. The bone island is not a disease, so there is no need to worry about it. You can have a regular follow-up film every year or so.