Kawasaki Disease: A Rare Case of a Non-pediatric Patient.

Kawasaki disease (KD) is an inflammatory condition more common in children but rare in adults, where diagnosis can be challenging due to nonspecific symptoms. Early recognition is essential to prevent severe complications. We present the case of a 26-year-old male with adult-onset KD who initially presented with vague symptoms, resulting in diagnostic delays. The condition progressed to life-threatening cardiovascular complications, including coronary artery aneurysms, underscoring the critical need for prompt identification and management. Timely treatment with intravenous immunoglobulin and corticosteroids led to clinical improvement and prevention of further cardiac damage. This case highlights the importance of heightened clinical awareness of KD in adults and the necessity of a proactive diagnostic approach. Future research should aim to refine diagnostic criteria for adult KD and explore strategies for improving early detection and long-term cardiovascular outcomes in this rare population.