Conventional endoscopic images of the EGJ and mid-thoracic esophagus before and after POEM. 3-a, b Before POEM, the EGJ is extremely tight. Whitish color change is seen on the surface mucosa without permeability of vascular structures. 3-c, d After POEM, the narrow segment of the EGJ has been totally released. The status of the surface mucosa is significantly improved, and permeability of the surface vascular patterns is restored.
Minami et al. BMC Gastroenterology 2013 13:22 doi:10.1186/1471-230X-13-22