Mondo Description A benign, pigmented skin growth caused by an overgrowth of the epidermis. It is typically seen at birth, but can develop in early childhood or later in life. Most cases are sporadic, but familial patterns of inheritance have been observed.

Uniprot Description Epidermal nevi of the common, non-organoid and non-epidermolytic type are benign skin lesions and may vary in their extent from a single (usually linear) lesion to widespread and systematized involvement. They may be present at birth or develop early during childhood.

Disease Ontology Description A skin disease characterized by localized epidermal thickening with hyperpigmentation that develops at or shortly after birth.