DSG1 and pemphigus foliaceus: Among these diseases is pemphigus, a group of acquired autoimmune vesiculobullous diseases (pemphigus vulgaris [PV], pemphigus foliaceus [PF], and pemphigus paraneoplastic [PNP]), characterized by B-cell–mediated immunoglobulin G antibodies against desmogleins 1 and 3.