Illustration (left) of the tissue that stem cells are taken from : the deltoid muscle, epidermis, blood from the arm, adipose tissue in the waist, bone marrow from the iliac crest and thigh muscles. On the right, tissue that can be treated by injecting stem cells : - The skin, from stem cells in the epidermis. - Cardiac tissue, from stem cells in the thigh muscles, bone marrow from the iliac crest and adipose tissue. - The blood, from stem cells in the blood, combined with medicine. The cells are injected by transfusion. - Bones, from stem cells in blood marrow injected into the top of the femur (to treat osteoporosis). Blood vessels from stem cells in bone marrow or adipose tissue. - The muscles, from stem cells in the thigh muscle, from the deltoid muscle (to treat hereditary muscle diseases or sphinteric deficiency). Autologous stem call transplantation helps prevent any rejection of donor cells.