Here is a quick search off of treatingyourself.http://www.cancerlinksusa.com/chemo/marijuana_use_in_cancer.asp
There are specific cancers listed. I see it offers support and advice on cancers. I haven't had the oppurtunity to see what info. they provide. I know from my Father's Cancer that nutrition is very important
. Marijuana is more of a medicine Shotgun, rather than the "Silver Bullet" of prescribed Med.'s.
The various compounds present in marijuana effect different problems. THC , Cannabinoids,Terpenes,CBD's, etc. all act to help in various ways. This is why I suggested seeing if Sativa (more of an up weed) or Indica (more of a narcotic effect) is better suited to your ailments.
It may be that Sativa's in the A.M. and Indica at night help you better. However you may not have that ability to get choosy about what you can get to treat yourself. Remember to keep your food intake up, use Ensure (cans) if you have to.... Chocolate tastes better I think. I'll post some more Medical info about how marijuana works in the body as explained from a book I have. At least you'll have more info. than your Dr. seems capable of giving you. Hang in there. People care, and you are in good company here.