IgG/IgA-pemphigus — extremely rare blistering autoimmune diseases

Purpose. To present a clinical case of IgG/IgA pemphigus in a 32-year-old woman. Material and methods. Clinical and laboratory examinations were performed to diagnose the disease: cytological examination of an impression smear from the bottom of the erosion, histological examination of a skin biopsy sample from the lesion, immunofluorescent examination of a biopsy sample of visually accessible unaffected skin. Results. Clinical manifestations of the disease were similar to Duhring's dermatitis herpetiformis, morphological ones to pemphigus vulgaris, but immunofluorescent examination of the skin biopsy sample in equal measure revealed deposits of both IgG and IgA in the epidermis, which allowed to determine a diagnosis of IgG/IgA pemphigus. Dapsone therapy at a dose of 100 mg per day led to a significant improvement in the patient's condition. Conclusion. Diagnosis of bullous dermatoses requires immunofluorescent examination of a biopsy sample of visually accessible unaffected skin. Dapsone was an effective medication for the patient with IgG/IgA pemphigus.