Almost all those AFAIK who have rid themselves of cancer have done it by
eating raw only.
Carrot juice was one report, not too hard to persuade people to try it. This
was the story of an older woman though.
Cosider that he may be sensitive to electromagnetic radiation ('frig motors,
hair blow dryers, placement of his bed in a field). This was proven
statistically  for growing children (leukemia) at universities in California
and Alberta.

William