When I was in the middle of Folfox treatment I had a colonoscopy. I don't recall either my oncologist of GI doc being concerned about the chemo and the scope. I did make sure to do the scope on an off week so I didn't feel like crap on that particular day.
4/2017 DX: sigmoid colon cancer
stage II with one positive margin
5/2017 - 11/17 12 rounds of FOLFOX
11/17 - 12/17 Increase in back pain and testicular pain.
CEA increased, CT scan indicated mass on rectal portion of colon
1/18 - 2/18 25 rounds of radiation treatment
5/18 surgery, interoperative radiation, bladder/ureter modification
7/18 normal blood work and CT scan
9/18 increased CEA, mass on outside of small intestine
10/18 Debulking surgery/illeostomy
1/19 Ostomy reversal