“…This has been previously reported [6,7,10], mainly in the absence of endoluminal lesions, or when only infiltrative or compressive mucosal changes are seen endoscopically [27]. False positive cytological results are rare, in the order of 0-1.4% [7,9,28,29]; this is an important concept since, due to lack of surgical tissue for most of our patients, we could not assess the positive predictive value (PPV) of these cytologically positive but biopsy-negative specimens. Therefore, we believe that such results consist of false negatives on biopsy.…”