Alternative titles and symbols : Hidradenitis suppurativa, familial; Acne inversa, familial;
Description : Acne inversa is a chronic relapsing inflammatory skin disease characterized by recurrent
draining sinuses and abscesses, predominantly in skin folds that carry terminal hairs
and apocrine glands. Healing occurs with substantial scarring. The prevalence of acne
inversa has been estimated at 1 in 100 to 1 in 600. The female-to-male ratio in most
published series is between 2:1 and 5:1 (Jansen et al., 2001). Jansen et al. (2001)
provided a detailed history and review of the disorder. - Genetic Heterogeneity of
Familial Acne Inversa Familial acne inversa-2 (ACNINV2; 613736) is caused by haploinsufficiency
for the PSENEN gene (607632) on chromosome 19q13.1. Familial acne inversa-3 (ACNINV3;
613737) is caused by haploinsufficiency for the PSEN1 gene (104311) on chromosome
14q24.3, making this disorder allelic to early-onset Alzheimer disease (607822).;
Inheritance : Autosomal dominant;
Molecular basis : Caused by mutation in the nicastrin gene (NCSTN, 605254.0001);