Autoinflammatory

Adult onset still's disease (AOSD) is an autoinflammatory condition characterized by fevers, arthritis, and rash. It is considered an orphan disease because of its low prevalence - it is reported anywhere between 16 to 40 per ten million. Traditionally, a bimodal distribution by age has been reported with peaks at the ages of 15 to 25 and between 36 to 46.