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The in situ stage of conjunctival squamous cell carcinoma is called conjunctival squamous intraepithelial neoplasia (CSIN). The use of terms such as Bowen’s disease and ocular surface squamous neoplasia are discouraged as their meanings vary and are prone to misinterpretation. The severity of squamous epithelial dysplasia is graded by the proportion of involved surface epithelium. […]