Year 2022 / Volume 114 / Number 12
Original
Findings in the distal and proximal colon in colonoscopy screening after positive FIT and related pre-procedure factors

719-724

DOI: 10.17235/reed.2022.8409/2021

M.ª Henar Núñez Rodríguez, Pilar Díez Redondo, Fausto Riu Pons, Marta Cimavilla, Andrea Loza, Manuel Perez-Miranda,

Abstract
Background: Colonoscopy is the gold standard method for the early diagnosis and prevention of colorectal cancer (CRC). Screening programs include immune determination of blood in feces. Regardless of the method used, proximal colon lesions appear to be detected less frequently. Objective: Analyze the characteristics of proximal and distal lesions and possible predisposing factors. Methods: A cross-sectional study was performed of 692 patients from the CRC screening program with FIT ≥ 100ngHb/ml (October 2017 - October 2018). The right colon was examined twice as patients were participating in a randomized clinical trial to re-evaluate the right colon by forward-viewing endoscope or proximal retroflexion. The adenoma detection rate (ADR), advanced neoplasia (AN) and CRC in the proximal and distal colon, the histological and morphological characteristics in each section were analyzed. Results: 52.9% of the patients were male, with a mean age of 59.5 years (SD: 7.6). 1490 polyps were found and the ADR was 57.7% (distal 42% and proximal 37%). Detection rates were 45.8% for AN, 40.9% for advanced adenomas, 5.2% for advanced SSL and CRC was diagnosed in 4.8% of patients. Males had more AN than females. The mean age of patients with AN was significantly higher. AN were associated with smoking and alcohol consumption (p=0.0001). Globally, FIT levels were higher in patients with AN (p=0.003). Sixty-six per cent of cancers were distally located and 61.3% of CRC were diagnosed in the early stages. Conclusions: In an average-risk asymptomatic population undergoing colonoscopy after positive FIT, AN were more common in the distal colon in males, older patients, smokers and those with alcohol intake.
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Núñez Rodríguez M, Díez Redondo P, Riu Pons F, Cimavilla M, Loza A, Perez-Miranda M, et all. Findings in the distal and proximal colon in colonoscopy screening after positive FIT and related pre-procedure factors. 8409/2021


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Publication history

Received: 19/10/2021

Accepted: 05/03/2022

Online First: 14/03/2022

Published: 12/12/2022

Article revision time: 123 days

Article Online First time: 146 days

Article editing time: 419 days


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