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GastroenterologyColo-rectum and anus

Polyps

Clamshell polyp
The distal portion of a "clamshell" polyp (top photo) was resected, but total removal required retroversion (bottom photo), which also shows the injection of a permanent surgical marker so the site can be identified at the follow-up examination.

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This image is taken from U. Seitz, S. Bohnacker, S. Seewald, F. Thonke, N. Soehendra & J. Waye. Chapter 4, In Colonscopy, Advanced Digestive Endoscopy e-books. GastroHep.com.
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