The early symptoms of osteosarcoma mainly include the following types: First, pain - patients will experience obvious pain in the affected limb. Second, lumps - lumps can be felt on the affected limb, accompanying significant tenderness. The growth rate of such lumps is directly related to your pathology and the course of your disease; the more severe your condition, the larger the lump. Third, limping - limping is caused by chronic pain in the affected limb. Over time, there may also be limited joint mobility and muscle atrophy in the affected limb. Fourth, symptoms such as fever, weight loss, and anemia may occur. Furthermore, in the middle and late stages of osteosarcoma, pathological fractures might occur.