Interstitial alveolitis as early manifestation of anti-Jo-1 positive polymyositis.

Polymyositis (PM), dermatomyositis (DM) and inclusion-body myositis belong to a heterogenous group of inflammatory myopathies. Pulmonary manifestations occur in a minority of PM patients due to infiltration of diaphragmatic and thoracic muscles or more rarely due to interstitial lung disease. Here, we report on the case of a 67-year-old patient who developed an interstitial idiopathic alveolitis as an early and rare manifestation of anti-Jo-1-positive polymyositis. Clinical and pathogenetical features of the PM associated interstitial alveolitis are discussed.