What happens if you have bone cancer is it possible that they would cut your leg off?

Bone cancer: Cancer of the bone is most often metastatic from another primary cancer in the body. The common ones that metastasize to bone are Prostate, Breast, Kidney, Thyroid, and Lung cancer. Primary cancer of the bone can be of different types. If it is a metastasis you treat the primary cancer and stabilize the bone. Amputation is occasionally needed but limb salvage is preferred.

No: Radical surgery such as removing a leg is a very uncommon procedure for cancer. They can remove some parts of the muscle and/or bone, but when doing this, this is reconstructed/grafted to maintain the leg. For most situations in which cancer involves the bone (typically cancer from elsewhere spreading to the bone), no surgery is done.