Metachronous Colorectal Adenomas Occur Close to the Index Lesion.
Journal
Journal of clinical gastroenterology
ISSN: 1539-2031
Titre abrégé: J Clin Gastroenterol
Pays: United States
ID NLM: 7910017
Informations de publication
Date de publication:
01 10 2023
01 10 2023
Historique:
received:
22
03
2022
accepted:
19
07
2022
medline:
11
9
2023
pubmed:
3
2
2023
entrez:
2
2
2023
Statut:
epublish
Résumé
The aim of this study is to assess the spatial relationship between index and metachronous colorectal adenoma location. After the complete excision of a human sporadic colorectal adenoma, patients are at elevated risk of developing a further metachronous adenoma. Data regarding the occurrence site of a metachronous colorectal adenoma relative to the index adenoma are scarce. Prospectively maintained databases were interrogated to identify all colonoscopies and adenoma excisions performed over a 10-year period at a single university teaching hospital. Data for the colonic segments at which adenoma removal were reported at index and all subsequent colonoscopies were extracted and 2 allied data sets merged. A total of 15,121 colonoscopies and 4759 polyp events were recorded. Four hundred fifty-two patients [296 male, 156 female, median (range) age 75 (32 to 100) y] developed at least 1 metachronous adenoma at follow-up colonoscopy. When single index events only are considered (ie, synchronous adenoma cases excluded), over 61% of metachronous adenomas were recorded in the same or an adjacent colonic segment. When the full span of the colon is considered, metachronous adenomas were more likely to occur in a section of the colon proximal to that of the index adenoma (41%±5%) than the same (39%±5%) or distal segment (20%±5%; P =0.006; 1-way χ 2 test). A metachronous human sporadic colorectal adenoma is more likely to be found in the same colonic segment to that of the index adenoma or 1 immediately adjacent. These data suggest a shared origin of metachronous adenoma with preceding lesions, supporting the existence of precancerous fields.
Sections du résumé
GOALS
The aim of this study is to assess the spatial relationship between index and metachronous colorectal adenoma location.
BACKGROUND
After the complete excision of a human sporadic colorectal adenoma, patients are at elevated risk of developing a further metachronous adenoma. Data regarding the occurrence site of a metachronous colorectal adenoma relative to the index adenoma are scarce.
STUDY
Prospectively maintained databases were interrogated to identify all colonoscopies and adenoma excisions performed over a 10-year period at a single university teaching hospital. Data for the colonic segments at which adenoma removal were reported at index and all subsequent colonoscopies were extracted and 2 allied data sets merged.
RESULTS
A total of 15,121 colonoscopies and 4759 polyp events were recorded. Four hundred fifty-two patients [296 male, 156 female, median (range) age 75 (32 to 100) y] developed at least 1 metachronous adenoma at follow-up colonoscopy. When single index events only are considered (ie, synchronous adenoma cases excluded), over 61% of metachronous adenomas were recorded in the same or an adjacent colonic segment. When the full span of the colon is considered, metachronous adenomas were more likely to occur in a section of the colon proximal to that of the index adenoma (41%±5%) than the same (39%±5%) or distal segment (20%±5%; P =0.006; 1-way χ 2 test).
CONCLUSIONS
A metachronous human sporadic colorectal adenoma is more likely to be found in the same colonic segment to that of the index adenoma or 1 immediately adjacent. These data suggest a shared origin of metachronous adenoma with preceding lesions, supporting the existence of precancerous fields.
Identifiants
pubmed: 36731090
doi: 10.1097/MCG.0000000000001758
pii: 00004836-990000000-00055
doi:
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
937-944Informations de copyright
Copyright © 2022 Wolters Kluwer Health, Inc. All rights reserved.
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