Will a bone marrow transplant cure bone marrow cancer?

Often yes: Bone marrow transplants are often curative for cancers of the bone marrow, i.e. leukemia. It is even more highly curative of benign bone marrow diseases, such as aplastic anemia. Bone marrow transplants are less useful for other types of cancer (e.g. breast or lung) that has spread to the bone marrow.

Yes: However it depends on the type of cancer, if it is in remission or not ,age of the patient and the type of donor. It also depends on the type of transplant, from self or another donor