Fig. 1.

Endoscopic findings of gastrointestinal polyps in patients with Cronkhite–Canada syndrome. A distribution and size of polyps. The outer circle shows the distribution pattern, and the inner circle shows the predominant size of the polyps. Data are expressed as the percentage of the total number of patients. The dominant types in the small intestine were sparsely distributed smaller polyps. The polyps in the stomach were more confluent than those in the colon (81.9 % vs 54.5 %, p < 0.01), and smaller (in the stomach 18.1 % were larger than 15 mm, 51.4 % were 5–10 mm, and 30.5 % were smaller than 5 mm, and in the colon 30.4 % were larger than 15 mm, 44.6 % were 5–10 mm, and 25 % were smaller than 5 mm; p < 0.05). B endoscopic appearance of polyps. Appearance was classified into four categories (edematous, engorged, with erosion, or with hemorrhage) according to the most dominant appearance. C the endoscopic appearance in the mucosa between the polyps was classified as normal or abnormal. Abnormal usually indicates edematous or reddish coarser mucosa than normal (74 % in the stomach and 57.6 % in the colon, p < 0.01)