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The use of acetic acid in the characterization of polyps, produces a homogeneous white staining in sessile serrated adenomas, but not in tubular or tubulo-villous adenomas, a simple approach to predict polyp histopathology.
To determine the diagnostic accuracy of the use of acetic acid on tubular and serrated adenomas, during colonoscopy, a prospective diagnostic accuracy study was designed, taking as gold standard the pathological anatomy of the resected polyps.
Polyps found during a colonoscopy with suspicion of sessile serrated adenomas or tubular/tubulo villous will be included.
In our experience tubular or tubulovillous adenomas with acetic acid have the same behavior as normal colonic mucosa. When sprayed with acetic acid they stain white, as well as the surrounding mucosa, but with a subsequent rapid loss of the effect. In contrast, serrated adenomas maintain an "aceto-whitening" reaction even though the surrounding normal mucosa loses staining.
The objectives are to determine the sensitivity and specificity, positive and negative probability coefficients of the positive or negative aceto-whitening reaction on serrated adenomas and tubular-tubulo-villous adenomas.
To determine the diagnostic accuracy of the use of acetic acid on tubular, tubulo-villous and serrated adenomas a prospective diagnostic accuracy study was designed considering the gold standard as the pathological anatomy of resected polyps.
As independent variables the presence or absence of aceto-whitening reaction after staining and the diagnostic impression of the endoscopist without acetic acid are considered. The presence or not of the aceto-whitening reaction will be evaluated, understanding it as the persistence of white staining of the polyp at one minute or three minutes, standing out from the surrounding mucosa.
In case of positive staining it will be considered homogeneous if the staining is uniform on the surface of the polyp or heterogeneous if it is done irregularly.
Place: German Hospital, endoscopy unit.
Data analysis: the data collected in double-entry tables will be captured to obtain the same sensitivity, specificity and positive or negative probability coefficients.
Sample size: 100 polyps.
Estimated duration: 1 month
Acetic acid % spray
Published on BioPortfolio: 2019-11-14T17:39:49-0500
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ACETIC ACID or acetic acid esters substituted with one or more CHLORINE atoms.
Acetic acid and its derivatives which may be formed by substitution reactions. Mono- and di-substituted, as well as halogenated compounds have been synthesized.
A very strong halogenated derivative of acetic acid. It is used in acid catalyzed reactions, especially those where an ester is cleaved in peptide synthesis.
Inflammation of the COLONIC DIVERTICULA, generally with abscess formation and subsequent perforation.
Derivatives of phenylacetic acid. Included under this heading are a variety of acid forms, salts, esters, and amides that contain the benzeneacetic acid structure. Note that this class of compounds should not be confused with derivatives of phenyl acetate, which contain the PHENOL ester of ACETIC ACID.