Osteosarcoma, a type of bone cancer, typically manifests with specific symptoms. The most prominent signs include localized pain in the affected bone and a visible swelling. It is crucial to note that not all bone pain indicates osteosarcoma or another bone tumor. Key characteristics of osteosarcoma-related pain are its persistence and independence from movement; pain may occur even during rest or sleep. Therefore, any persistent bone pain, especially if it continues during rest, warrants prompt medical evaluation. In advanced cases, the tumor can weaken the bone, leading to pathological fractures, which can also be a symptom of osteosarcoma. As osteosarcoma is a malignant bone tumor, it can metastasize to other organs or bones in advanced stages. The symptoms of metastasis will vary depending on the specific organ or bone to which the cancer has spread. For instance, if osteosarcoma metastasizes to the brain, symptoms such as headaches or vision disturbances may occur.