A Case of Adult-Onset Still's Disease with Positive Antinuclear Antibodies.

Adult-onset Still's disease (AOSD) is a rare inflammatory disorder involving multiple systems. It can present a wide range of symptoms like maculopapular rash, fever, and arthralgia, which may overlap with many other disorders, making it difficult to diagnose. Unknown etiology and no diagnostic tests further make it complex to establish the diagnosis of AOSD.