The sensitivity for diagnosing BE increased with the circumferential length of the BE segment up to 87.2% (95% CI 83.0%–90.6%, Cochran-Armitage trend test, p < 0.001; Table 2), and TFF3 positivity was not reduced in the presence of dysplasia (Cochran-Armitage trend test, p = 0.253; Table 2). The gene discussed is TFF3; the disease is dysplasia.