The word carcinogenesis was poorly chosen, but do note my question
mark!

A statistical association within one study in no way indicates a
cause, much as high cholesterol is not of itself a direct cause of
heart disease. (50% of heart attacks are said to occur in people
with low cholesterol.
There are plenty of good reasons to moderate sugar, and this may (or
may not) turn out to be another.

Excerpt: "Of all the carbohydrate compounds, sucrose and fructose
demonstrated the strongest association with breast cancer risk in
the study".

Note also Willett's comment:
"This study raises important questions about high carbohydrate
diets, particularly among populations or individuals prone to
insulin resistance. However, one study is not enough to make major
changes in diet, and more work on this topic is urgently needed,"

Mike

I'm not sure this answers your question directly but it's worth reading.

http://www.mercola.com/2001/jul/14/insulin.htm

--Hua Kul