Abstract
Pemphigus is a life-threatening autoimmune blistering disease. Pemphigus is divided into 4 major types; pemphigus vulgaris, pemphigus foliaceus, paraneoplastic pemphigus, and IgA pemphigus. Among them, IgA pemphigus is characterized by tissue-bound and circulating IgA antibodies targeting desmosomal or nondesmosomal cell surface components in the epidermis. Histopathologically, slight epidermal acantholysis and extensive neutrophilic infiltration in either the upper part or all layers of the epidermis were observed. IgA pemphigus is subdivided into intraepidermal neutrophilic IgA dermatosis-type (IEN-type), whose target antigen is still unknown (probably nondesmosomal cell surface protein), and subcorneal pustular dermatosis-type (SPD-type), whose target antigen is desmocollin 1 (Dsc1). We summarize reported cases of IgA pemphigus and describe current knowledge including epidemiology, clinical manifestations, pathology, laboratory tests, pathophysiology, associated diseases, prognosis and treatment, and future perspectives of IgA pemphigus.
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