A characteristic feature of Still's disease -

Stills disease is a variant of rheumatoid commonly occurring in adults in 20's and 30's. Patients characteristics clinical features are: High spiking fever often up to 40°C. Sore throat Evanescent salmon coloured non pruritic rash, seen on chest & abdomen Lymphadenopathy Pericardial effusion Wrist joint involvement Chances are that you might confuse it with Felty's syndrome so I am giving the important features of both these conditions together