proctitis/cancer post j-pouch surgery

I would think it's rare. They leave only a tiny cuff to connect to the j-pouch - a few centimeters, and mine was stripped of cells. The pouch itself is created out of the terminal ileum. I asked my surgeon about small bowel cancer, and he said it's extremely rare. The inflammation should be gone too even in the cuff, unless you have cuffitis, or pouchitis, you're no longer dealing with chronic inflammation which is what increases the chances of getting cancer for UCers. If you have inflammation post j-pouch surgery, cuffitis or pouchitis frequently, perhaps you would be at risk.

As an example of colorectal cancer odds, if UC only involves the rectum (proctitis) then your odds of CRC are the same as the general population (not at all increased) as far as colonoscopy screenings for CRC go after 10 years with UC. That's referring to a well managed case of proctitis, different if you've been flaring the whole time.

So it seems the greatest likely hood of CRC is when you have Ulcerative colitis higher up in the sigmoid colon, transverse, etc., and yours are now gone