It is possible to actually transplant hair to skin that has been grafted. In fact, we have been able to transplant hair on people who’ve had scars and burns with great success. However, when there is a history of radiation, there is always a concern about the blood vessels, vascular supply and whether it will be adequate to build the support for the hair follicles. You mentioned that there is an indentation on your scalp with some fat atrophy or volume loss from the radiation. I would consider some different actions such as treating the indentation by something called Micro fat transfer. However, this is very dependent on the skin quality and whether or not there is a lot of scar tissue. In our practice involving surgical hair transplant, we routinely use a material called extracellular matrix (ECM) that is made by ACell. This is a material that is derived from the bladder of pigs and it has a protein called a scaffold that has been used to help restore wounds, particularly open wounds, in the military or war injuries. I also have been using this material for the past 7 years for the treatment of hair loss and used the same material for several of my cosmetic and reconstructive surgeries. It works by regenerating tissues, so when used in hair transplants, it increases hair growth. When used in the body, it stimulates adult stem cells so that the wounds heal by duplication of the natural tissue that’s supposed to be there instead of healing by scarring Before jumping right away to hair transplant, in my practice I would first do a physical examination and do a test session on the scalp. Here, I would transplant 100 or 200 hairs by microscopic surgical technique from the donor part of the scalp and inject extracellular matrix. After the surgery, we observe how those hairs grow. If they grow well, then the patient and I would have more confidence about going ahead with the procedure.