Early stage of leg bone cancer may manifest different symptoms according to the severity of the disease and individual’s physical condition, which mainly include pain, lump, dysfunction and pathologic fracture. 1. Pain: Early stage of bone cancer of leg can show mild localized pain, which is intermittent. Later, it can gradually develop into persistent severe pain. 2. Lumps: local swelling or lumps may appear, and some bone cancers with rich blood transportation may also have vascular rage. 3. Functional disorder: if bone cancer is adjacent to knee joint, it can cause knee joint activity disorder; if adjacent to hip joint, it can cause hip joint activity disorder. 4. Pathological fracture: bone cancer can destroy bone quality, which can lead to fracture under slight external force. Other symptoms such as fever, fatigue and weakness may also appear in the early stage of bone cancer of legs, if the above symptoms appear, it is recommended to go to hospital for consultation and regular treatment as soon as possible.