Head/Neck Cancer survivor & brother has colon polyp

I am 3 years out of Nasal cancer and I am active in that forum.
Yesterday, I found out my brother had a colon scan, and has a polyp (tumor?), that is 50mm (2 inches ) in diameter. He tells me it is also close to his (kidney? liver?)
He is waiting for the biopsy, and in the head & neck world, one is always reminded, “it’s not cancer, until they tell you it’s cancer”.
Can any of you tell me if polyp/tumor size and being close to his internal organs makes a difference?
I very much appreciate any input from survivors. (I told him this site is a lot better than getting “info” off the internet.) THANK YOU!!
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