I had pelvic/abdominal radiotherapy treatment almost 50 years ago and started to suffer problems with digestion about 20 years ago, put down at the time, to IBS.
In 2017, I underwent a hemicolectomy and the surgeon told me at the time that my small bowel was quite damaged commenting that she was surprised I could absorb anything through it. As my digestion issues slowly worsened, I was referred to a gastroenterologist who, after a SEhCAT test diagnosed 99% bile acid malabsorption, probably secondary to radiation enteropathy. I take high dose Vitamin D3, iron tablets and have 3 monthly Vitamin B12 injections
Last year an abdominal CT scan showed a sub acute small bowel blockage and other small bowel features which I understand to be consistent with radiotherapy damage.
More recently I have become mildly anaemic (RBC 3.71). A FIT test revealed blood in my stool but a subsequent colonoscopy and gastroscopy did not identify a cause. In the absence of any other likely cause am I right in thinking that the blood in my stool is most likely to be from my damaged small bowel?