Bone marrow is a spongy material inside your bones where your body makes and stores blood cells. When it’s damaged, it makes too few blood cells and not enough cells for your immune system.
A transplant replaces damaged bone marrow with healthy marrow cells. It can cure certain diseases or some types of cancer. It also means a long recovery process and a risk of serious side effects. If you’re thinking about having one, talk with your doctor about all the pros and cons of the transplant.