PMC5559657_01
High-definition endoscopy of the transverse pedunculated polyp showing (A) the long stalk and (B) a magnified view of the head of the polyp with adenomatous appearance.
CG-CGCR170065F001.jpg
PMC5559657_01_CG-CGCR170065F001.jpg
F1
Endoscopic inspection revealed a long 2.0-cm stalk with a 0.9-cm polypoid head in the transverse colon (Figure 1).
Histopathology of the lesion confirming inverted colonic diverticula. (A) Lobulation and fibrous septa. (B) Focal epithelial denudation, hyperplastic crypt architecture with branching crypts, a lamina propria with prominent fibromuscular proliferation and smooth muscle projections between individual glands, a polymorphic inflammatory infiltrate, dilated capillaries, and hypertrophy and upward extension of the muscularis mucosae.
CG-CGCR170065F002.jpg
PMC5559657_01_CG-CGCR170065F002.jpg
F2
Histology showed polypoid prolapsing mucosa folds consistent with a diverticular disease-associated or ICD polyp (Figure 2).