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Abstract
There are a number of strategies that may be adopated for evaluating the colon in patients suspected of having colorectal cancers or other large bowel lesions.Colonoscopy and barium enema offer excellent visualization of the colonic mucosa, but evaluation is necessarily limited to the colon. In comparison, CT-based techniques allow the potential to visualize extracolonic tissues and organs in addition to the colon .
CT has added benefit, compared with colonoscopy and barium enema, of not just evaluating the colon but also of detecting extracolonic abnormalities. Such extra-colonic findings may be useful in staging the cancer, may explain the patient’s presenting symptoms, and may detect other potentially serious disorders .
This study included 200 patients with signs and symptoms suspicious for colorectal carcinoma. They were 120 females & 80 males.
Review of the clinical history of the patient as well as the presenting signs and symptoms with CT examination was done searching for colonic & extracolonic lesions.
The results of the CT scan of the abdomen & pelvis of the 200 patients revealed normal CT examination with no significant abnormality detected in 70 patients. On the other hand 130 patients presented with positive findings.
Fifty five of those 130 patients were found to have colorectal carcinoma. Fourty out of these 55 patients had extracolonic findings as well. The remaining ISpatients had no extracolonic findings.
The CT diagnosis of colorectal carcinoma was confirmed by the following procedures, surgery with pathologic confirmation in 10 patients, colonscopy with pathologic confirmation in 20 patients and barium enema in 25 patients.
Sixty patients out of 130 were found negative for colorectal carcinoma but showed other incidental extracolonic findings. The remaining ISpatients had colonic lesions other than carcinoma, that could account for their presenting signs and symptoms.