title: Vancomycin-induced linear IgA disease manifesting as bullous erythema multiforme.
abstract: BACKGROUND
  Vancomycin-induced linear immunoglobulin A (IgA) disease, an autoimmune, blistering disease in response to vancomycin administration, is characterized by a subepidermal, vesiculobullous eruption and linear IgA deposition along the basement membrane zone on direct immunofluorescence.
  
  
  METHODS
  We report the case of an 81-year-old man treated with vancomycin who developed diffuse erythema multiforme and tense bullae involving the palmoplantar surfaces. Discontinuation of vancomycin therapy resulted in complete resolution of this patient's cutaneous eruption.
  
  
  RESULTS
  Biopsy of a representative skin lesion demonstrated lichenoid interface dermatitis with focal subepidermal clefting, dyskeratosis, and prominent eosinophils. Direct immunofluorescence showed linear basement membrane staining with immunoreactants to IgA; indirect immunofluorescence demonstrated the presence of circulating IgG antibodies binding in an intercellular pattern. Immunoprecipitation studies using the patient's serum revealed 210, 130, and 83 kDa target antigens.
  
  
  CONCLUSIONS
  Presenting with an initial clinical picture suggestive of bullous erythema multiforme, this patient's subsequent clinical course and direct immunofluorescence confirm the diagnosis of linear IgA bullous disease (LABD). His indirect immunofluorescence findings and immunoprecipitation results suggest that circulating non-IgA antibodies may represent a newly recognized immunopathologic feature of vancomycin-induced linear IgA disease, underscoring the variable and unpredictable manifestations of this drug-induced cutaneous disease.
authors.affiliation: Pasteur/Doris Duke Clinical Research Fellowship, Harvard Medical School, Boston, MA, USA. april_armstrong@student.hms.harvard.edu
authors.forename: April Wang
authors.initials: AW
authors.lastname: Armstrong
authors.forename: Amin
authors.initials: A
authors.lastname: Fazeli
authors.forename: Shih Wei
authors.initials: SW
authors.lastname: Yeh
authors.forename: Bonnie T
authors.initials: BT
authors.lastname: Mackool
authors.forename: Vincent
authors.initials: V
authors.lastname: Liu
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D000900:Anti-Bacterial Agents / Q000009:adverse effects*; D001327:Autoimmune Diseases / Q000139:chemically induced* / Q000473:pathology; D004892:Erythema Multiforme / Q000139:chemically induced* / Q000473:pathology; D006801:Humans; D007070:Immunoglobulin A; D008297:Male; D012867:Skin / Q000473:pathology; D012872:Skin Diseases, Vesiculobullous / Q000139:chemically induced* / Q000473:pathology; D014640:Vancomycin / Q000009:adverse effects*
chemical_list: D000900:Anti-Bacterial Agents; D007070:Immunoglobulin A; D014640:Vancomycin