Keywords: BMZ, basement membrane zone; DIF, direct immunofluorescence; EBA, epidermolysis bullosa acquisita; IPMN, intraductal papillary mucinous neoplasm; IgA, immunoglobulin A; IgM paraprotein; IgM, immunoglobulin M; LABD, linear IgA bullous dermatosis; MGUS; epidermolysis bullosa acquista; immunobullous; immunofluorescence; paraproteinemia; skin fragility.