Abstract
Juvenile idiopathic arthritis (JIA) results in pain, limited joint mobility, and a subsequent decline in quality of life, academic performance, and emotional health in children. Early diagnosis is essential for timely intervention and improving patient outcomes. Musculoskeletal ultrasound (MSUS) provides a safe and convenient management to assess disease and detect lesions and can be repeated easily. Despite its advantages, few studies have shown the role of ultrasound in the diagnostic framework for JIA in Taiwan. We reported the practical application of MSUS for early diagnosis and ultrasound-guided arthrocentesis in a patient with JIA. The procedure led to immediate improvement in the patient's symptoms without complications while also reducing the risk of repeated radiation exposure. These findings highlight the potential of utilizing MSUS as a valuable diagnostic and therapeutic modality in managing JIA.