Esophagitis

Description

Framed around the distal gullet (esophagus) and proximal stomach, the sectioned lumen exposes the stratified squamous mucosa transitioning at the gastroesophageal junction (Z line) to gastric columnar mucosa over the cardia. Concentric layers of submucosa and muscularis externa surround the esophageal tube, then blend inferiorly into the thicker gastric wall where the mucosa forms prominent rugae. A focal narrowing at the esophagogastric junction corresponds to the lower esophageal sphincter region, positioned superior to the gastric cardia and medial to the greater curvature contours implied by the rugal folds. Inflammatory change in this location is most often reflux esophagitis, where acid and pepsin injure the distal squamous epithelium, producing erythema, edema, and sometimes superficial erosions that typically cluster just proximal to the Z line. The relationship between the sphincter zone and the cardia is a teaching point for why a hypotensive LES or sliding hiatal hernia shifts the injury pattern proximally, and why chronic exposure can lead to Barrett esophagus with intestinal metaplasia at or above the junction. Clinicians anchor their endoscopic description to this anatomy. Landmarks matter. Use this artwork for gastroenterology and pathology lectures when you need to correlate layered wall anatomy with mucosal injury patterns at the gastroesophageal junction, or for patient education materials explaining GERD, erosive esophagitis, and surveillance for Barrett changes. It also fits surgical and endoscopic training content that discusses LES physiology, biopsy targeting at the Z line, and how gastric rugae distinguish stomach from esophagus in cross section. Anatomical accuracy verified by SciePro's Medical Advisory Board.