MONDO_0015635 (porokeratotic eccrine ostial and dermal duct nevus) is a rare, congenital disorder of the eccrine sweat ducts that presents as grouped keratotic papules and plaques with a linear distribution and/or multiple punctate pits filled with tiny keratotic plugs resembling comedones. The lesion are usually located on the acral portion of a limb. Also known as: Porokeratotic eccrine duct and hair follicle Nevus, Porokeratotic eccrine nevus, comedo nevus of the palm, linear eccrine Nevus with comedones.