This video demonstrates a Hill Grade III/Grade IV gastroesophageal valve. The is opening around esophagus is not tight, and the squamous epithelium can be viewed from below. This represents a very small (Type I) hiatal hernia.
Video donated to the SAGES Video Atlas of Endoscopy by Eric M Pauli, MD
Keyword(s): esophagus, Hill grade III/IV GE valve, squamous epithelium, type I hiatal hernia