Adult-onset Still's disease (AOSD) is a rare disease. Very few cases have been reported from the South-Asian region so the aim of this study is to assess the clinical and laboratory aspects of 15 patients with AOSD in a tertiary referral hospital in Karachi.
Retrospective data was collected from all patients diagnosed using Yamaguchi criteria for AOSD between January 2004 and December 2010 at Jinnah Medical College Hospital, Karachi.
Data of 15 patients with AOSD were analyzed. Their ages ranged from 17 to 55 years, the male-to-female ratio being 6:1. The most common clinical features were fever and articular symptoms (100%), sore throat (60%), rash (53.3%), weight loss (93.3%), lymphadenopathy (40%) and elevated erythrocyte sedimentation rate (86.7%). All patients had leukocytosis with counts>20,000/mm 3 were seen in 40%. Elevated liver enzymes were present in 80% of the case series and hyperferritinemia in 100% with a mean of 3,962 ng/mL (range 555-13,865). Ambiguity in presentation and lack of serologic markers make diagnosis of AOSD difficult as 40% of patients were receiving empirical anti-tuberculous therapy prior to final diagnosis.
It is necessary for physicians to have a high index of suspicion for AOSD in patients with high-grade fever, arthralgia and leukocytosis.