In core decompression surgery, the patient is anesthetized and small drill holes are made from the outside of the hip that go inside the head of the femur. The diseased bone is cored out. This is done under X-ray guidance. It’s a small procedure and after injecting the stem cells into the upper end of the femur, the wound is closed. The patient can weight bear as tolerated after the surgery, and usually goes home the same day.