Autosomal dominant epidermolytic hyperkeratosis-2A (EHK2A) is a skin disorder characterized by blistering, keratoderma, and erythroderma. Severity and body involvement show clinical heterogeneity (summary by Syder et al., 1994). While the neonatal presentation is often blistering and redness, the primary features of the disorder are hyperkeratosis (thickening of the uppermost layer of the epidermis, the stratum corneum) and blistering (summary by Chipev et al., 1994). For a discussion of genetic heterogeneity of epidermolytic hyperkeratosis, see EHK1 (113800). [from OMIM]