Processed meats have repeatedly been connected to a variety of cancers. 
I'm not familiar with the optimal diet society, but the inclusion of 
dairy might  also play a role in his/her cancer. Dairy proteins contain 
opioid peptides that can down-regulate natural killer cells, the body's 
first line of defense against malignancy (1). Recent research has shown 
that opioid blocking medication, alone (2) or in combination with immune 
stimulating medication (3), can result in complete cancer remissions.

> Don't the Poles also eat a lot of ham? I don't consider any processed 
> meats to be paleo. I bet the optimal diet has no restrictions on 
> processed meats.
>
> And haven't processed meats recently been linked to colon cancer?
>
best wishes,
Ron
Sources:
1. Hoggan R.Considering wheat, rye, and barley proteins as aids to 
carcinogens. Med Hypotheses. 1997 Sep;49(3):285-8.
2. Berkson BM, Rubin DM, Berkson AJ. Reversal of signs and symptoms of a 
B-cell lymphoma in a patient using only low-dose naltrexone. Integr 
Cancer Ther. 2007 Sep;6(3):293-6
3. Berkson BM, Rubin DM, Berkson AJ. Revisiting the ALA/N (alpha-lipoic 
acid/low-dose naltrexone) protocol for people with metastatic and 
nonmetastatic pancreatic cancer: a report of 3 new cases.
Integr Cancer Ther. 2009 Dec;8(4):416-22. Erratum in: Integr Cancer 
Ther. 2010 Jun;9(2):247.

-- 
PK