Bullous skin disease: an unusual allergic reaction to vancomycin.

Severe reactions due to vancomycin are uncommon. We describe a case of vancomycin-induced linear immunoglobulin A bullous disease and review the literature pertinent to this entity. This is a rare subepidermal blistering disorder, with a heterogenous clinical presentation. It is characterized by IgA deposition in a linear pattern along the basement membrane zone. It seems to be autoantibody-mediated and is not dose-dependent. Spontaneous and complete skin healing follows vancomycin withdrawal; rechallenge reproduces the disease with a more rapid and severe onset. Because vancomycin is almost never suspected to be the cause of such manifestations, awareness of this rare autoimmune reaction is crucial. Early diagnosis through direct immunofluorescence of the perilesional skin would avoid unnecessary laboratory investigations and therapeutic measures and would shorten significantly the pain and suffering of these patients.