<unk>  is a rare autosomal dominant disease of the conjunctiva and the oral mucosa caused by a duplication of chromosome 4q35. In the mouth it appears similar to white sponge nevus, with painless, diffuse, folded and spongy white plaques. In the eye it appears as gelatinous plaques on bulbar perilimbal conjunctiva.
Hereditary benign intraepithelial dyskeratosis
Paraneoplastic acrokeratosis
Congenital erosive and vesicular dermatosis
Keratosis pilaris atrophicans
Smokeless tobacco keratosis
Hereditary mucoepithelial dysplasia
Disseminated superficial actinic porokeratosis
Hydrocarbon keratosis