<qa>  What is the name of the area of the hip numbed with?If you experience low blood counts while you are on study, and the doctor thinks it is severe, you will have a bone marrow biopsy to check for the cause of the low blood counts.To collect a bone marrow biopsy, an area of the hip is numbed with anesthetic, and a small amount of bone marrow and bone is withdrawn through a large needle. 