“…In El Bagre‐EPF and in other autoimmune blistering diseases including PF, bullous pemphigoid (BP), pemphigus vulgaris (PV), epidermolysis bullosa acquisita, linear IgA disease, and dermatitis herpetiformis, we have noted patient vessels overexpressing HLA‐DPDQDR antigen, ribosomal protein s6‐ps240, cyclo‐oxygenase 2, and C5‐b9/MAC. These patient biopsies also revealed vascular rouleaux phenomenon and other vascular inflammatory markers, including CD3, CD20, CD1a, HAM56, CD68, and S100, and autoantibodies to the vessels . We confirmed our data by IHC, which prevents the “autofluorescence” possible when using DIF/IIF.…”