["Diagnosis of Barrett's neoplasia requires collection of large numbers of random biopsy samples; the process is time consuming and can miss early-stage cancers. We evaluated the role of acetic acid chromoendoscopy in identifying Barrett's neoplasia.", "Data were collected from patients with Barrett's esophagus examined at a tertiary referral center, between July 2005 and November 2008 using Fujinon gastroscopes and EPX 4400 processor (n = 190). All procedures were performed by a single experienced endoscopist. Patients were examined with white light gastroscopy and visible abnormalities were identified. Acetic acid (2.5%) dye spray was used to identify potentially neoplastic areas and biopsy samples were collected from these, followed by quadrantic biopsies at 2 cm intervals of the remaining Barrett's mucosa. The chromoendoscopic diagnosis was compared with the ultimate histological diagnosis to evaluate the sensitivity of acetic acid chromoendoscopy.", 'Acetic acid chromoendoscopy had a sensitivity of 95.5% and specificity of 80% for the detection of neoplasia. There was a correlation between lesions predicted to be neoplasias by acetic acid and those diagnosed by histological analysis (r = 0.98). There was a significant improvement in the detection of neoplasia using acetic acid compared with white light endoscopy (P = .001).'] Is acetic acid spray an effective tool for the endoscopic detection of neoplasia in patients with Barrett 's esophagus?