<prompt> Answer this question truthfullyWhat is the history of osteosarcoma and what are its symptoms?  <response>: <reason> Symptoms of osteosarcoma may be present weeks or months occasionally longer prior to the confirmed diagnosis. The most common related symptom are: Common symptoms of osteosarcoma include:Bone pain Bone fracture may occur after what seems like a routine movement Limping if the tumor is in the leg Pain when lifting if the tumor is in the arm Swelling and redness at the site of the tumor 