C'mon, guys. The doctor said very clearly - and other doctors have already confirmed - that there are no lifestyle risk factors with this kind of cancer.
I wouldn't go that far. The doctor said there were no known lifestyle risks correlated with it. But in such a rare cancer, there is likely very limited opportunity to study such correlation. Just because it isn't known doesn't mean there isn't one.
That said, I wouldn't speculate that there are lifestyle risks for it either. I just think that it's clear that we don't know either way.