[Refractory pneumonia : when evoke an Adult-Onset Still's Disease ? Case report and review of literature].

Adult-Onset Still's Disease (AOSD) is an inflammatory systemic disease, including fever, arthralgia and rash. The disease can also cause organic involvement, and lead to serious complications. We report the case of a patient who presented a pulmonary form of AOSD, initially diagnosed and treated as pneumonia. Marked hyperferritinemia oriented us to the right diagnosis. In this article, we proceed to a review of literature to look for a better comprehension of physiopathology of pulmonary involvement in AOSD, and to withhold some practical advice in the diagnostic procedure.