Three cases of solitary Peutz-Jeghers-type hamartomatous polyp in the duodenum

Figure 1 Upper gastrointestinal endoscopy in patient 1 revealed a semi-pedunculated polyp, 18 mm × 15 mm in diameter, on the oral side of the Papilla of Vater. The polyp showed an irregularly lobular surface and slightly whitish color with diffusely scattered white spots on the surface.

Figure 2 Histologically, the polyp consisted of branching bundles of smooth muscle fibers covered by hyperplastic duodenal mucosa.

Figure 3 Upper gastrointestinal endoscopy in patient 2 revealed a peduncular polyp, 10 mm × 8 mm in diameter, in the second portion of the duodenum. The polyp showed an irregularly lobular surface and slightly whitish color with diffusely scattered white spots on the surface.

Figure 4 Histologically, the polyp consisted of branching bundles of smooth muscle fibers covered by hyperplastic duodenal mucosa containing a focus of cancer near the surface.

Figure 5 Upper gastrointestinal endoscopy in patient 3 revealed a semi-pedunculated polyp, 10 mm × 10 mm in diameter, in the duodenal bulb. The polyp showed an irregularly nodular surface and slightly whitish color with diffusely scattered white spots on the surface.

Figure 6 Histologically, the polyp consisted of branching bundles of smooth muscle fibers covered by normal duodenal mucosa. Brunner’s glands existed in the central part of the polyp.