Local recurrence after successful endoscopic submucosal dissection for rectal mucinous mucosal adenocarcinoma: A case report

Figure 4 Endoscopic findings of the recurrent tumor. A: A protrusion tumor (Is) with redness is observed on the scar after endoscopic resection; B: Chromoendoscopy shows an elongated tubular surface tumor with a hypervascular pattern on the Is lesion; C: The flat elevated lesion (IIa) located at the base of Is tumor indicates dilated crypts; D: Crystal violet staining indicates irregular structured pits on the Is; E: Magnified endoscopy shows round crypts with a sessile pit pattern on the IIa lesion; F: Macroscopic view of the specimen resected by re-endoscopic submucosal dissection. The removed Is+IIa lesion is surrounded by normal mucosa.