Educational comparison of healthy esophagus versus Eosinophilic Esophagitis (EoE), presented through endoscopic, histological, and schematic views. The top row features macroscopic endoscopic photographs: the healthy esophagus shows a smooth, pale pink lumen, while the EoE esophagus exhibits characteristic longitudinal furrowing and white exudates (micro-abscesses). The middle row presents H&E stained histological sections, with the EoE slide demonstrating significant intraepithelial eosinophil infiltration and basal cell hyperplasia compared to the structured healthy tissue. The bottom section is a pathophysiology diagram illustrating the esophageal layers (stratum corneum, spinosum, germinativum, and basement membrane). In the healthy state (left), immune cell presence is minimal, primarily consisting of T cells and Langerhans cells. In the inflamed EoE state (right), there is a dense recruitment of immune cells from the vasculature, including eosinophils, basophils, neutrophils, dendritic cells, B cells, macrophages, and monocytes, highlighting the Th2-mediated chronic inflammatory response.

This composite educational image illustrates diagnostic modalities for Eosinophilic Esophagitis (EoE) in a 52-year-old patient. Panels (a) and (b) present White Light Endoscopy (WLE) and indigocarmine chromoendoscopy, respectively, showing classic endoscopic features: linear furrows, white exudates, and concentric rings (trachealization) within the esophageal lumen. Panel (c) utilizes Narrow-Band Imaging Magnifying Endoscopy (NBI-ME), demonstrating beige-colored mucosa and characteristic dot-shaped intrapapillary capillary loops (IPCLs) without visible cyan vessels. Panel (d) displays high-magnification endocytoscopy (x520), an in vivo imaging technique showing multiple cells with purple bilobed nuclei and nonstained peripheries (white arrowheads), characteristic of eosinophilic infiltration. Panel (e) provides histological correlation (H&E stain) from a biopsy of the same site, confirming dense eosinophilic infiltration (>50 eosinophils per high-power field) with prominent bilobed nuclei (white arrowheads). The image provides a comprehensive comparison between gross endoscopic findings, advanced in vivo microscopy, and gold-standard histopathology for gastroenterology education.

A dual-panel comparison exhibiting normal esophageal findings. Panel (A) is a clinical photograph from an esophagogastroduodenoscopy (EGD) showing a healthy esophageal lumen. The mucosa is characterized by a smooth, pink, and glistening surface without evidence of mucosal rings, linear furrows, white exudates, or strictures, indicating the absence of typical eosinophilic or lymphocytic esophagitis features. Panel (B) is a diagnostic histology image (Hematoxylin and Eosin stain) of an esophageal biopsy at high power. It demonstrates normal stratified squamous epithelium with organized cellular maturation. The basal cell layer appears healthy without hyperplasia, and the lamina propria is free of significant inflammatory cell infiltration, specifically lacking eosinophils or intraepithelial lymphocytes. Together, these images serve as a baseline for normal esophageal anatomy and histology in a pediatric gastroenterology context, often used to confirm mucosal healing following treatment for conditions such as chemical or thermal injury.

This composite educational image illustrates the diagnostic features of eosinophilic esophagitis (EoE) through endoscopy and histopathology. Upper panels (A, B, and C) display clinical endoscopic views of the esophagus. Panel A reveals trachealization, characterized by prominent circular rings. Panel B shows longitudinal linear furrows and narrowings. Panel C demonstrates mucosal fragility (crepe-paper esophagus) with visible erosions and minor surface bleeding. The lower panel (D) is a high-power light microscopy image of an H&E stained esophageal biopsy. It shows dense intraepithelial inflammation with numerous eosinophils (indicated by the dashed orange arrow), exceeding the diagnostic threshold of 15 eosinophils per high-power field. A solid white arrow points to an eosinophilic microabscess, a collection of eosinophils within the squamous epithelium. The image serves as a clinical reference for gastroenterology and pathology, highlighting the correlation between macroscopic structural changes and microscopic inflammatory infiltrates in chronic allergic esophagitis.