There are several types of tumors on the bone: 1. Tumors that protrude outside the bone. The most common is osteochondroma, which is protruding outside the bone cortex and can be touched under the skin. This is a benign tumor, which is not a problem as long as it is removed. 2. Bone tumors growing in the bone. Tumors growing in bones are generally divided into two cases, which can be benign or malignant tumors. If a tumor grows on the bone, routine X-ray, CT examination and MRI examination must be performed, and if necessary, whole body imaging should be done. To confirm the diagnosis of benign lesion or malignant lesion for future treatment.