Thanks for posting your query at DoctorSpring.com. I am Dr Kini and I am pleased to assist you.
You have given a good description of your symptoms.
This does not look like IBS at all for me for three reasons -
1. You have blood in stools at times
2. The pain wakes you up from sleep
3. You have lost significant weight.
These three do not occur in IBS.
Yes colitis is a possibility give the fact the CT scan showed thickening of the colon for a significant length.
I would advise you to get a second opinion. You can approach medical college hospital where the doctors would be more experienced including the pathologist. A repeat colonoscopy with biopsy by a different Doctor is the next thing to do.
I hope that answers your question. Please feel free to discuss further.
Patient replied :
Doctor Kini, thank you for your opinion. My current gastro-doc seems to think the bowel wall thickening on the cat scan is nothing more than the prep clinging to the bowel wall. Couldn't that be so? I am confused. If I have colitis, how could he have missed it? I'm afraid to go to yet another doc.
Bowel thickening occurs if there is inflammation or malignancy.
Inflammation occurs if there is infection or could be part of inflammatory bowel disease or if there is exposure to certain medications and chemicals. Yes bowel preparation can sometimes cause some degree of inflammation.
So even if the thickening is considered to be due bowel preparation, there is no explanation for the blood in stool which occurred before the bowel preparation and other symptoms like pain waking you up from sleep and loss of weight.
So it is prudent to get a second opinion. Do not hesitate !
Let me know if I can assist you further.