Diffuse Interstitial Lung Disease Revealing Antisynthetase Syndrome.

Interstitial lung disease (ILD) is a frequent manifestation of connective tissue diseases. They may be revelatory of the disease or occur during follow-up. Antisynthetase syndrome (ASS) is a complex and heterogeneous autoimmune disorder. Antisynthetase antibodies, in particular the anti-Jo-1 antibody, characterize this syndrome. The occurrence and severity of ILD determine the prognosis, which in turn determines therapeutic management. We report the case of a 53-year-old female patient presenting with ILD, revealing the diagnosis of ASS. The evolution was favorable with bolus corticosteroids associated with cyclophosphamide.