What is a bone marrow biopsy im anemic and can't retain iron been getting artificial iron infusions for about four years now, allergic to iron that is why I get artificial.

BM biopsy. It is when they either use your sternum or hip to remove a sample of the bone marrow and reviewit under the microscope. It is painful so ask about pre-treatment.
A . A bone marrow biospsy is a procedure that can be done via a needle (likely in the pelvic bone) to remove bone with the marrow inside so that the specimen can be further observed under a microscope. This test is used to diagnose and detect blood disorders or cancer/infections in the bone marrow so that your doctor can dtermine a treatment regimen.