There is a very promising melanoma vaccine under development which may still be undergoing clinical trials. Go to the website of the Cancer Research Institute - www.cancerresearch.org - and you should be able to find some information on the vaccine, which is not commercially offered as a drug yet - but maybe he could get into one of the clinical trials. I heard one of the research doctors who is involved with the trial, speak about it, and it apparently saved one man who was already in hospice. It appears to be pretty effective. It has already been approved for use in dogs (yes, they get melanoma too.)