Barium Enema

CT

Colorectal Cancer:Sigmoid Colon 

Barium Enema :Concentric narrowing of sigmoid colon with overhanging edges.(Apple core lesion-characteristic

CT Scan concentric thickening of the wall of the sigmoid colon>Narrowing lumen.

Predisposing:Adenoma(93%).

Mc Site:Rectosigmoid region.

Tuomr growing along the Lymphatic channels that parallel the circular muscle fibers of the inner layer of muscularis propria>Apple Core.

Othe Causes of apple core Appearence:

• Lymphoma
  
• Diverticulitis
  
• Benign tumors
  
• Chronic inflammatory Bowel Disease

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