Recurrent polymyositis triggered by bronchiectasis-associated infections.

Polymyositis is a cell-mediated autoimmune disease and various systemic infections can trigger it. However, there have been only rare reports of recurrent polymyositis triggered by systemic infections. We report the case of a 69-year-old woman with recurrent polymyositis triggered by bronchiectasis-associated infections. This case indicates that recurrent polymyositis triggered by systemic infections suggests a non-specific autoimmune antigenic response of polymyositis.