Linear IgA bullous dermatosis (LABD) is a rare autoimmune vesiculobullous disorder characterized by variable clinical presentations that may mimic bullous pemphigoid, dermatitis herpetiformis, cicatricial pemphigoid and erythema multiforme. A few cases of drug-induced LABD that clinically resembled toxic epidermal necrolysis (TEN) have been reported. A subset of patients with LABD have been found to be drug-induced; the most common drug being vancomycin. The diagnosis of LABD is confirmed by the presence of a linear band of IgA along the basement membrane zone on direct immunofluorescence microscopy. We report a case of a 77-year-old man who presented to us with vancomycin-induced LABD that presented clinically as TEN. He had a complete recovery over a 3-week period following discontinuation of the vancomycin and the addition of oral dapsone therapy. It is important to be aware that drug-induced LABD can mimic TEN.

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Patients with systemic lupus erythematosus (SLE) often develop leg ulceration, particularly those with antiphospholipid antibodies or with vasculitis. Pyoderma gangrenosum (PG) is an idiopathic ulcerative neutrophilic dermatosis that is commonly associated with inflammatory bowel disease or seronegative polyarthritis. Although PG-like lesions have been commonly described in patients with the antiphospholipid antibody syndrome, the occurrence of PG as a preceding manifestation of SLE has only rarely been reported. We present a patient who developed PG roughly 8 years prior to developing SLE.

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