case_images: PMC5463671_01
case_images: Ascending colon mass with hematoxylin and eosin (H&E) staining. (a) Low power view showing abrupt transition from colon mucosa to benign squamous mucosa, suggesting ectopic esophageal tissue in the right colon (5x). (b) Well-differentiated keratinizing SCC next to colonic glandular mucosa in the right colon (10x).
case_images: zjch_a_1309339_f0001_oc.jpg
case_images: PMC5463671_01_zjch_a_1309339_f0001_oc.jpg
case_images: F0001
case_images: Histologically, there was benign squamous mucosa with patterns suggestive of esophageal tissue and staged IIa invasive SCC (Figure 1).
case_images: PMC5463671_02
case_images: Colonoscopy showing a non-obstructing 6 cm hepatic flexure friable and ulcerating mass without any visible synchronous lesions.
case_images: zjch_a_1309339_f0002_oc.jpg
case_images: PMC5463671_02_zjch_a_1309339_f0002_oc.jpg
case_images: F0002
case_images: EGD was unremarkable, but colonoscopy identified mass in the hepatic flexure (Figure 2).