Differential diagnosis It is often mistaken for leukoplakia. Classification The ICD-10 lists<unk>  under "other congenital malformations of mouth". It could be classified as a skin condition, or more precisely as a genodermatosis (a genetically determined skin disorder).
White sponge nevus
Eccrine nevus
Melanocytic nevus
Halo nevus
Dysplastic nevus
Connective tissue nevus
Hydrocarbon keratosis
Arsenical keratosis