A Case of Adult Stills Disease: Not So Uncommon Cause of Fever of Unknown Origin

Adult still’s disease (ASD) is a defined clinical entity and a known cause of fever of unknown origin (FUO). It is a rare systemic inflammatory disorder characterized by a triad of symptoms: daily (quotidian) spiking fever (>39°C), arthritis and an evanescent salmon-colored rash. First described in 1971, it is a uncommon, difficult to diagnose, auto inflammatory, multisystem disorder. The disease is characterized by two subsets according to clinical and laboratory features: systemic or articular. Early diagnosis and treatment of the disease can prevent morbidity and mortality with a favorable outcome. We present and discuss a young male patient who presented as FUO and was diagnosed timely as ASD and treated with corticosteroids with a favorable prognosis.