Porokeratosis 4, Disseminated Superficial Actinic Type, also known as porokeratosis, disseminated superficial actinic, 2, is related to porokeratosis. An important gene associated with Porokeratosis 4, Disseminated Superficial Actinic Type is POROK4 (Disseminated Superficial Actinic Porokeratosis 2). Affiliated tissues include skin.