case_images: PMC10624940_01
case_images: a An obstructing distal sigmoid colon adenocarcinoma was found by the colonoscopy. b The uncovered self-expandable metal stent was placed. c Abdominal CT obtained 24 h after stent deployment. d Half of the stent was outside the anus.
case_images: crg-2023-0017-0001-533615_F01.jpg
case_images: PMC10624940_01_crg-2023-0017-0001-533615_F01.jpg
case_images: F1
case_images: Therefore, an uncovered WallFlex colonic stent (Boston Scientific, Denver, CO, USA) was placed successfully at the site of the tumor stricture (Fig. 1a-c). During digital rectal examination, we found half of the stent was outside the anus and a patch of mucosa was embedded in the stent (Fig. 1d).
case_images: a Colonoscopy through the internal of the stent showed a lump of edematous congestive mucosa was embedded in the proximal end of the stent. b Embedded mucosa was removed by means of hot rat-tooth forceps. c The removed stent with some broken wires at the proximal end. d Wounds left by endoscopic removal of the stent.
case_images: crg-2023-0017-0001-533615_F02.jpg
case_images: PMC10624940_01_crg-2023-0017-0001-533615_F02.jpg
case_images: F2
case_images: Colonoscopy showed easy passage of the colonoscope through the tumor site and the proximal end of the stent, with edematous mucosa embedded (15 mm in diameter) (Fig. 2a). Therefore, we switched to remove the mucosa by using heated rat-tooth forceps (Fig. 2b). Following the extraction of the stent, some broken wires were found at the proximal end, without muscularis injury on the wound surface (Fig. 2c-d).
case_images: Ulceration of the mucosa was found by colonoscopy follow-up 4 days later.
case_images: crg-2023-0017-0001-533615_F03.jpg
case_images: PMC10624940_01_crg-2023-0017-0001-533615_F03.jpg
case_images: F3
case_images: Four days later, the colonoscopy showed ulceration without perforation (Fig. 3).