Jon:
You will not lose all your hair if you are doing a combination of chemo (usually Cisplatin) and radiation. The only hair loss is on the back of your head at the base of your ears. This never grows back, but can be disguised by growing your hair longer int he back.

If you do Induction Therapy, you will lose your hair. It will grow back, but probably will be curly. It starts growing back almost immediately.

Sandyst