Endoscopic diagnosis of cervical esophageal heterotopic gastric mucosa with conventional and narrow-band images

Figure 1 Endoscopic images of cervical esophageal heterotopic gastric mucosa. A: Conventional imaging (CI) image of a typical heterotopic gastric mucosa (HGM) patch; B: Narrow-band imaging (NBI) appears to increase contrast and enhance the mucosal details between the columnar and squamous epithelia; C: Single HGM was found by CI image; D: In NBI contrast, additional small HGM was noted superior to the medium HGM; E: CI image in a patient with circumferential HGM and esophageal stenosis; F: With NBI, the columnar mucosa appears dark brown, and the squamous epithelia, light green. This sharp contrast of coloration aids in the detection of circumferential lesions.