Figure 4.

Juvenile polyps. A: Juvenile polyps are hamartomatous polyps and typically found in the antrum. Solitary polyps have hamartomatous or inflammatory components. B: Juvenile polyps are less specific in their histology than Peutz-Jeghers polyps and are sometimes referred to as inflammatory or retention polyps when unassociated with a syndrome. Their histologic features include dilated irregular glands (arrow), irregular rounded surface contour, lamina propria edema, and inflammation (hematoxylin and eosin stain, 40× magnification).