Hello & Welcome to Just Answer,
Could you please help me understand your problem by giving me the following details:
1) Any other symptoms/ significant medical issues or significant history?
2) Any medicines that he might be taking?
Thanks. Shall be waiting for your reply.
Thanks for the additional details. I think that by doing a CT now, the doctors are trying to look/ exclude the following possibilities which could manifest with diarrhea:
(a) Carcinoid tumor
(b) Pancreatic cancer (islet cell tumor)
(c) Gastrinoma, etc
That said, I think that the doctors may also like to exclude certain other conditions, like:
(a) Bacterial overgrowth
(b) Microscopic colitis due to NSAID use
(c) Osmotic diarrhea
(d) Malabsorption syndrome
(e) Parathyroid adenoma
(f) Bile induced diarrhea, etc.
I hope that this information is helpful to you. Please feel free to inquire if you have any remaining concerns or doubts, and it would be a privilege and a pleasure to try and help out as much as I can. Best wishes.
Thanks for the query. A carcinoid syndrome may not be detected during a colonoscopy and a CT may pick it up. Kindly have a look at this web resource which provides authentic information about this condition:
Regarding malabsorption syndrome, it is like a basket of various different causes, which have to be identified/ evaluated and ruled out one by one. Please have a look at this web resource which provides authentic information about this syndrome, as it might be helpful in your father’s case: