Adult onset Still's disease (AOSD) is a chronic multi-system inflammatory disorder characterized by high spiking fever, polyarthralgia and skin rash. Lymphadenopathy and hepatosplenomegaly is another prominent feature of adult onset Still's disease. We describe a 19 years old lady presented with fever, skin rashes and polyarthritis for 3 months. Examination revealed fever, typical skin rash, lymphadenopathy and polyarthritis. On investigation there was neutrophilic leukocytosis, high ESR, high ferritin level but RA test as well as ANA test were negative. History, clinical examinations and laboratory findings fulfill Yamaguchi criteria diagnostic of AOSD. With proper treatment, now she is free of symptoms and leaving a healthy life.
Key words: Adult onset Still's disease, Polyarthralgia, Salmon colored evanescent rash.