Old Smokey, you may want to have a look at "Medline."
Using the search terms "Pilot" AND "cancer" revealled this paper...
http://www.ncbi.nlm.nih.gov/entrez/q...=pubmed_docsum
which could be a starting point for your enquiries.
I think the matter of pilots and health was discussed on this very forum some years ago. At the time, I think the advice was that an insurance actuary would probably be more of a help to you than a doctor, but the general feeling was that pilots on the whole lived longer and better than Joe Average, due to their socio-economic advantage (I got in trouble for that one), but the incidence (?prevalence) rate was higher for skin cancers.