“Postpolypectomy bleeding can be classified as immediate(intraprocedural or within 24 h of the examination) ordelayed (between 1 to 14 days after the examination). Polyp-related risk factors for postpolypectomy bleedinginclude polyp size, location, and morphology.Right-sided polyps have increased risk of bleeding aftera polypectomy compared to the left-sided polyps due tothinner bowel wall in the right hemicolon and the closeproximity of submucosal vessels to colonic mucosa . The larger size of the polyp (1 cm or larger), sessilepolyps, and polypectomies in patients on anticoagulantsincrease the risk of postpolypectomy bleeding.”
CT imaging findings of complications of optical colonoscopy
Abhishek Keraliya · Hei Shun Yu · Jennifer W. Uyeda
Emergency Radiology (2022) 29:915–923

“Postpolypectomy syndrome (PPS) (also known as postpolypectomyelectrocoagulation syndrome, and transmural burn syndrome) is a relatively uncommon complication and occurs in approximately 0.5–2.9% of patients undergoing polypectomy. Patients clinically present with localized pain, tenderness, fever, and leukocytosis without signs ofgeneralized peritonitis and bowel perforation. The proposed mechanism of PPS is transmural burn injury to the colonic wall due to electrical current applied during polypectomy. CT plays an important role in diagnosing PPS and to exclude colonic perforation. CT findings of post-polypectomy syndrome include segmental concentric mural thickeningwith a stratified enhancement pattern and pericolonic inflammatory stranding without pneumoperitoneum. PPS is usually managed conservatively with fasting, intravenous hydration, and parenteral antibiotics; and thus CT helps in treatment planning by excluding perforation.”
CT imaging findings of complications of optical colonoscopy
Abhishek Keraliya · Hei Shun Yu · Jennifer W. Uyeda
Emergency Radiology (2022) 29:915–923

“Although rare, other postcolonoscopy complications including acute appendicitis, diverticulitis, acute pancreatitis, liver abscess, chemical colitis, pneumothorax, pneumomediastinum, subcutaneous emphysema, intussusception, ureteral obstruction, and omental infarction have been seen. Acute appendicitis is an uncommon complication of colonoscopy and is thought to be due to forcing bowel contents into the appendix from insufflation and manipulation. Acute diverticulitis is rare complication of colonoscopy with incidence up to 0.029% as found in a largeretrospective analysis done by Gorgun et al.”
CT imaging findings of complications of optical colonoscopy
Abhishek Keraliya · Hei Shun Yu · Jennifer W. Uyeda
Emergency Radiology (2022) 29:915–923

“Colonoscopy is one of the most commonly performed endoscopic procedures and remains the most commonly used screening modality method for colorectal cancer (CRC) screening in the USA. Although serious complications of fiberoptic colonoscopy are uncommon due to technical advances, due to increasing number of colonoscopy procedures, post-procedural complications are not uncommonly encountered in the routine clinical practice. Also, as some of the post-colonoscopy complications are life threatening, it is important to diagnose them early so that timely treatment measures can be taken to decrease mortality and morbidity.”
CT imaging findings of complications of optical colonoscopy
Abhishek Keraliya · Hei Shun Yu · Jennifer W. Uyeda
Emergency Radiology (2022) 29:915–923