Development of a bullous pemphigoid after split-skin grafting.

An elderly female patient developed blisters localised to her split-skin donor and graft sites. Despite repeated swabs, bacteriology and virology returned negative; multiple antibiotic courses did not improve her condition, which generalised within weeks. Histology and immunofluorescence confirmed a clinical diagnosis of bullous pemphigoid and her condition resolved rapidly after treatment with prednisolone. Bullous pemphigoid can be precipitated or exacerbated by surgery and the diagnosis should be considered when patients present with persistent localised or generalised blisters, especially when microbiological investigations are negative.