Epidermolytic hyperkeratosis (EH) is a descriptive term for histopathologic changes that have been observed in various related and unrelated benign conditions. In two lesions on chronically sundamaged skin, EH occurred in association with nuclear atypia. This phenomenon represents an epidermolytic variant of solar keratosis.
Ackerman AB, Reed RJ. Epidermolytic Variant of Solar Keratosis. Arch Dermatol. 1973;107(1):104-106. doi:10.1001/archderm.1973.01620160072023