A 32 year old female, Swetha , is referred to you for evaluation of acute onset arthritis of hands, wrists, knees, and feet, as well a pruritic rash. The symptoms have been present for 3 weeks and her family physician found that she had an ANA of 1:160 and negative rheumatoid factor. She is sent to you with the diagnosis of SLE.
Examination: mild symmetric polyarthritis of hands, wrists, and feet. erythematous rash on the trunk.