Mucosal lesion, malignant

The diffuse form presents with multiple polypoid lesions and is called diffuse mucosal nodularity or malignant lymphomatous polyposis (O Connell and Thompson 1978 Callaway et al. 1997). The polyps appear smooth and sessile but can also be irregular or pedunculated. Often, the entire colon or a long segment is involved. 

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