3D Printed Pedunculated Adenoma of the Colon

3D Printed Pedunculated Adenoma of the Colon Clinical History A 50-year old male underwent a colonoscopy after testing positive for faecal occult blood during a screening test. Colonoscopy revealed a pedunculated tumour in the descending colon, which was later resected. Pathology This specimen is the resected segment of descending colon. There is a single dark lobulated mass visible arising from the mucosal surface. It is attached to a stalk which is 4cm in length. Histologically, the mass comprises a core of connective tissue covered with hyperplastic glandular epithelium of colonic type, with focal nuclear atypia. This is an example of a tubular colonic adenoma. Further InformationColorectal adenomas are intraepithelial neoplasms that characteristically display epithelial dysplasia. They are benign but are precursors to adenocarcinoma. Not all adenomas evolve into adenocarcinoma. They produce polyps (sometimes pedunculated) or sessile lesions or variable s