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Note: This is a series of images of CT scan in the diagnosis, staging and therapeutic follow-up of colorectal cancers, which I prepared for a talk that I had to give to general practitioners. By ‘prepared’ I mean I had selected representative images and annotated them to show the abnormality to laymen. So this series is not going to be exhaustively informative or educative. I would suggest places like this and this for more information on colorectal cancers for health professionals and patients who stumble in here from search engines.

Transverse Colon

Oblique transverse MIP image showing a  mass with concentric wall thickening and ‘apple core‘ appearance (black arrows) in the left side of the Transverse colon with severe irregular luminal narrowing. Contrast enema is seen in the large bowel with intravenous contrast enhancement of the abdominal organs and blood vessels.

Coronal MPR image with air in the colonic lumen showing the mass and apple core appearance (yellow arrows).

Axial CT section inferior to the Transverse colon shows nodular thickening of the greater omentum (yellow arrows), classically described as omental caking, caused by metastatic deposits. The same omental nodularity can also been seen in the first image between the transverse colon and the anterior abdominal wall.

For further information on colorectal cancers:

US National Cancer Institute’s Colon and Rectal Cancer Home Page and this online booklet for patients.

Mayo Clinic’s Colon Cancer Page.

Other posts in this series:

• CT scan in Colorectal Cancer
• CT in Colorectal Cancer - 2
• CT in Colorectal Cancer - 3
• CT in Colorectal Cancer - 4
• CT in Colorectal Cancer - 6

Tags: colorectal cancer, Computed Tomography

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