label: High Grade Anal Canal Intraepithelial Neoplasia
label_lc: high grade anal canal intraepithelial neoplasia
description: Intraepithelial neoplasia involving the anal canal.  The epithelial cells exhibit moderate dysplasia (grade II intraepithelial neoplasia) or severe dysplasia (grade III intraepithelial neoplasia or carcinoma in situ).