[Interstitial lung diseases from autoimmune origins: A prognostic and diagnostic challenge for the clinician]

Acute or subacute interstitial lung diseases from autoimmune origins are especially hard to diagnose but have to be detected promptly. We illustrate this necessity with three case reports. One case of paraneoplasic polymyositis, one case of interstitial lung disease caused by a connectivite and one case of interstitial lung disease related to an anti-synthetase syndrome. The subject is to alert the practitioners to the early search of extra pulmonary signs, autoantibodies analysis in the objective to set up quickly the right treatment.