Introduction: Retinoids are known to induce side effects which can be severe. Alveolar and interstitial pneumonia of uncertain pathogenesis can rarely occur when retinoid are used among patients with psoriasis.
Exegesis: We report an observation of acute respiratory distress beginning 26 days after introduction of acitretin, a second-generation retinoid. Treatment withdrawal and corticotherapy allow a spectacular amelioration of respiratory conditions.
Conclusion: Pneumonia induced by retinoid must be known as a side effect of treatment of psoriasis.