###Human: Can a pelvic CT scan show colon cancer? ###Assistant: Hello. I do not know why you are getting worried about colon cancer? These are not symptoms of colon cancer. As far as your query is concerned, colon cancer may or may not be detected on CT scan based on the stage of cancer. But in most cases, one can see abnormal growth over there. A colon cancer diagnosis is made on biopsy done by colonoscopy. I feel your symptoms are more related to irritable bowel syndrome. Try a good probiotic like cap VSL 3 (live freeze dried lactic acid bacteria and bifidobacteria) that would help you in regaining normal flora that might have been disturbed as a result of antibiotic intake. I need to know if you have any blood in stools, weight loss, or anemia?