High Grade Esophageal Squamous Intraepithelial Neoplasia

**Semantic type:** Neoplastic Process

**Definition:** Esophageal squamous intraepithelial neoplasia characterized by architectural abnormalities and dysplasia involving both the lower and the upper half of the esophageal squamous epithelium.

**Synonyms:** - Esophageal High-Grade Squamous Intraepithelial Neoplasia - High-Grade Esophageal Squamous Dysplasia - High-Grade Esophageal Squamous Intraepithelial Neoplasia