Serrated lesions of the colorectum: review and recommendations from an expert panel.
Serrated lesions of the colorectum are the precursors of perhaps one-third of colorectal cancers (CRCs). Cancers arising in serrated lesions are usually in the proximal colon, and account for a disproportionate fraction of cancer identified after colonoscopy. We sought to provide guidance for the clinical management of serrated colorectal lesions based on current evidence and expert opinion regarding definitions, classification, and significance of serrated lesions. A consensus conference was held over 2 days reviewing the topic of serrated lesions from the perspectives of histology, molecular biology, epidemiology, clinical aspects, and serrated polyposis. Serrated lesions should be classified pathologically according to the World Health Organization criteria as hyperplastic polyp, sessile serrated adenoma/polyp (SSA/P) with or without cytological dysplasia, or traditional serrated adenoma (TSA). SSA/P and TSA are premalignant lesions, but SSA/P is the principal serrated precursor of CRCs. Serrated lesions have a distinct endoscopic appearance, and several lines of evidence suggest that on average they are more difficult to detect than conventional adenomatous polyps. Effective colonoscopy requires an endoscopist trained in the endoscopic appearance of serrated lesions. We recommend that all serrated lesions proximal to the sigmoid colon and all serrated lesions in the rectosigmoid > 5 mm in size, be completely removed. Recommendations are made for post-polypectomy surveillance of serrated lesions and for surveillance of serrated polyposis patients and their relatives.
Indiana University, Indianapolis, Indiana, USA.
Douglas K
DK
Rex
Dennis J
DJ
Ahnen
John A
JA
Baron
Kenneth P
KP
Batts
Carol A
CA
Burke
Randall W
RW
Burt
John R
JR
Goldblum
José G
JG
Guillem
Charles J
CJ
Kahi
Matthew F
MF
Kalady
Michael J
MJ
O'Brien
Robert D
RD
Odze
Shuji
S
Ogino
Susan
S
Parry
Dale C
DC
Snover
Emina Emilia
EE
Torlakovic
Paul E
PE
Wise
Joanne
J
Young
James
J
Church
D000236:Adenoma / Q000473:pathology*; D003106:Colon / Q000473:pathology*; D003108:Colonic Diseases / Q000150:complications / Q000453:epidemiology / Q000473:pathology; D003111:Colonic Polyps / Q000473:pathology*; D015179:Colorectal Neoplasms / Q000473:pathology; D006801:Humans; D012002:Rectal Diseases / Q000150:complications / Q000453:epidemiology / Q000473:pathology; D012007:Rectum / Q000473:pathology*