Acne Inversa, Familial, 1, also known as hidradenitis suppurativa, familial, is related to acne inversa, familial, 3 and acne inversa, familial, 2, with or without dowling-degos disease. An important gene associated with Acne Inversa, Familial, 1 is NCSTN (Nicastrin). Affiliated tissues include skin and heart, and related phenotypes are atypical scarring of skin and acne inversa