Depressed-Type Colonic Lesions and “De Novo” Cancer in Familial Adenomatous Polyposis: A Colonoscopist’s Viewpoint
Figure 3
Case 1. (a) Chromoendoscopic image of sigmoid colon after indigo carmine spraying. There were many polyps. (b) The depressed-type lesion at the transverse colon. Magnified view of this lesion. (c) The specimen obtained by laparoscopy-assisted transversectomy. The lesion is within the red circle. (d) The microscopic view of the lesion. This lesion massively invated the submucosal layer. This type0 IIa+IIc cancer had no adenoma.
