Clinical Image

Solitary Hamartomatous Polyp of the Large Colon

Nadia Griller* and John W Wong
Sunnybrook Health Sciences Centre, University of Toronto, Canada


*Corresponding author: Nadia Griller, Sunnybrook Health Sciences Centre, University of Toronto, 2075 Bayview Ave, HG-63, Toronto, ON, M4N 3M5, USA


Published: 07 Nov, 2017
Cite this article as: Griller N, Wong JW. Solitary Hamartomatous Polyp of the Large Colon. Ann Med Case Rep. 2017; 1: 1029.

Clinical Image

A 20-year-old male presented with intermittent passage of bright red blood per rectum. Colonoscopy revealed a large, 2.5 cm pedunculated polyp at 40 cm from the anal verge (Figure 1). Polypectomy was performed with a hot snare. Histologic examination showed an architecturallydistorted expansion of benign colonic elements with many dilated retention cysts filled with mucin. The polyp stroma did not show any increase in smooth muscle elements (Figure 2). CT enterography did not identify polyps within the small bowel. There was no family history or findings on physical examination to suggest an underlying polyposis syndrome. The diagnosis of an isolated “juvenile” retention polyp, a type of hamartomatous polyp, was made. This rare type of polyp most commonly presents in early childhood as a left-sided, pedunculated polyp causing painless rectal bleeding. It does not confer an increased risk of colon cancer. At last follow up the patient’s bleeding had resolved.


Figure 1

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Figure 1
Polyp colour edited.

Figure 2

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Figure 2
Polyp colour edited.