Early bone cancer manifests as pain, localized mass, limb activity disorder and so on. Bone cancer is a general term for malignant tumors of bone, including osteosarcoma, osteochondrosarcoma, Ewing tumor and so on. Early bone malignant tumor manifestations mainly include pain, local mass, limb activity disorder and so on. 1. Pain: Early patients usually show mild intermittent pain, which is easy to be ignored by patients, and only in the late stage will there be obvious and persistent pain gradually. 2. Local lumps: with the increasing of tumor lesions, patients can touch local lumps, which are hard and accompanied by pain. 3. Limb movement disorder: if the primary lesion is in the joints, it will affect the patient’s limb function and cause limitation of movement.