*4.1.3 Squamous cell neoplasia*

Squamous cell neoplasia may be classified in CIN or squamous cell carcinoma, depending on whether it presents as a localized lesion confined to the surface epithelium (conjunctival intraepithelial neoplasia or dysplasia) or as a more invasive pathology which has broken through the basement membrane and invaded the underlying stroma. (squamous cell carcinoma).
