Normal Esophagus - Endoscopy
Normal Esophagus - Endoscopy

Black arrow marks the sqamo-columnar junction( Z-Line )
Note that the Z-Line while undulating has smooth contours
Green arrow marks gastric columnar epithelium above the sphincter which is seen as a round black hole
Red arow marks the pink white esophageal squamous epithelium
(Description By:Martin Nadel, M.D. )
(Image Contrib. by:Martin Nadel, M.D. UCHC )