Endoscopic submucosal dissection of multiple flat adenomas in the radiated rectum

Figure 3 A slightly elevated adenoma, 10 mm in size, in the posterior wall of the low rectum. A: The lesion was detected with a slight decline in vascular permeability on routine observation; B: Although we could highlight the irregular surface by spraying indigo carmine solution, it was not possible to determine the area of the lesion; C: Regarding surface structure, the lesion is composed mainly of IIIL pits with partially mixed IV pits on magnifying endoscopy with crystal violet staining; D: Magnifying endoscopy with crystal violet staining effectively delineates the margin of the lesion; E: Figure A showing lesion borders without the aid of yellow lines; F: Figure B showing lesion borders without the aid of yellow lines; G: Figure C showing lesion borders without the aid of yellow lines; H: Figure D showing lesion borders without the aid of yellow lines.