# A nurse is assessing a 4-year-old child with suspected juvenile idiopathic arthritis (JIA). Which assessment finding would be most characteristic of this condition? > source: MyMerci (mymerci.kr) > url: https://mymerci.kr/pages/nclex_q.php?qn_id=542373 > language: ko > subject: Child Health ## 문제 A nurse is assessing a 4-year-old child with suspected juvenile idiopathic arthritis (JIA). Which assessment finding would be most characteristic of this condition? ## 보기 1. Morning stiffness lasting more than 1 hour with joint swelling and warmth **✔ 정답** 2. Acute onset of severe joint pain with high fever and rash 3. Joint pain that worsens with activity and improves with rest 4. Muscle weakness with normal joint appearance and function **정답: 1** ## 해설 Morning stiffness >1 hour with joint swelling and warmth is the hallmark of JIA, known as the 'gel phenomenon' after inactivity. Other options are not characteristic of JIA. ## 심화 해설 Understanding the Key Characteristic of JIA When assessing a child for juvenile idiopathic arthritis (JIA), it is essential to differentiate its clinical presentation from other musculoskeletal or inflammatory conditions. JIA is an autoimmune disorder characterized by persistent joint inflammation, and its hallmark symptom is morning stiffness that improves with activity. This stiffness is a direct result of the inflammatory process within the synovium. During periods of inactivity, such as sleep, inflammatory mediators and fluid accumulate in the joint space, leading to the characteristic "gelling" phenomenon. As the child moves, the circulation of synovial fluid increases, and the stiffness gradually resolves. The study by Ruhof et al. (2026) provides direct evidence linking the duration of morning stiffness to disease activity. Their research demonstrated an association between morning stiffness duration and the physician active joint count in children with JIA [1]. This means that a longer duration of stiffness is a clinically significant indicator of active, ongoing arthritis. Therefore, a report of morning stiffness lasting more than 1 hour accompanied by objective signs of inflammation like joint swelling and warmth is highly characteristic of active JIA. Analyzing the Incorrect Options To solidify your understanding, let's dissect why the other options are not the most characteristic findings for JIA. - Option 2: Acute onset of severe joint pain with high fever and rash. This presentation is more suggestive of a systemic inflammatory condition like systemic-onset JIA (Still's disease) or an acute infection such as septic arthritis. While systemic JIA is a subtype, the classic, most common presentation of oligoarticular or polyarticular JIA is insidious and not typically associated with a high, spiking fever and a salmon-pink rash at the outset. The case reports highlight that JIA often presents with persistent joint swelling without systemic symptoms, which can initially mimic reactive arthritis or trauma [2]. - Option 3: Joint pain that worsens with activity and improves with rest. This is a classic description of mechanical pain, which is characteristic of degenerative conditions like osteoarthritis or overuse injuries, not inflammatory arthritis. In inflammatory conditions like JIA, the pain and stiffness are at their worst after periods of rest (morning stiffness) and are alleviated by gentle movement and activity. - Option 4: Muscle weakness with normal joint appearance and function. This finding pattern is more indicative of a primary myopathic disorder, such as muscular dystrophy, or a neuromuscular junction disorder, rather than an inflammatory joint disease. In JIA, the primary pathology is within the joint itself, leading to visible and palpable changes like swelling, effusion, and limited range of motion, which can be validated by clinical examination and imaging such as musculoskeletal ultrasound .References (research sources) - [1]Morning stiffness duration is associated with physician active joint count in juvenile idiopathic arthritis.Research articleRuhof N, Vastert SJ, van Royen A, Jansen MHA, van Nieuwenhove E, Swart JF, de Roock S. (2026) · DOI: 10.1186/s12969-026-01210-x - [2]Diagnosing Oligoarticular Juvenile Idiopathic Arthritis in a Two-Year-Old: A Case Report.Case reportRicha P, Thomas M, Keller O, Karastury S, Butala M. (2025) · DOI: 10.7759/cureus.90285 ## 임상 시나리오 Assessing Morning Stiffness in Pediatric JIADuration correlates with active joint count Inquire specifically about morning stiffness duration and its relation to activity. A duration of >1 hour is a strong indicator of active synovitis. Document objective signs: joint swelling, warmth, and loss of range of motion. These findings, combined with prolonged stiffness, distinguish inflammatory arthritis from mechanical pain. CautionDo not confuse with growing pains or injury. Pain that worsens with activity suggests a mechanical or overuse etiology, not JIA. A child with JIA often feels better after moving. ## 핵심 개념 - **Juvenile Idiopathic Arthritis (JIA)** — A chronic autoimmune inflammatory disease in children under 16, characterized by persistent joint inflammation lasting >6 weeks, with hallmark morning stiffness and joint swelling. - **Morning Stiffness** — The 'gelling' phenomenon caused by accumulation of inflammatory fluid in joints during inactivity; duration correlates with disease activity in JIA. - **Synovitis** — Inflammation of the synovial membrane lining the joint capsule, causing swelling, warmth, and effusion, which is the primary pathology in JIA. - **Gelling Phenomenon** — Stiffness that occurs after periods of inactivity, such as sleep or prolonged sitting, commonly seen in inflammatory arthritides like JIA. ## 같은 주제 문제 - [A nurse is assessing a 7-year-old child diagnosed with juvenile idiopathic arthritis (JIA)…](https://mymerci.kr/pages/nclex_q.php?qn_id=542371) - [A 7-year-old child with juvenile idiopathic arthritis (JIA) is being assessed during a rou…](https://mymerci.kr/pages/nclex_q.php?qn_id=542372) - [A 9-year-old child with juvenile idiopathic arthritis (JIA) is experiencing a flare-up wit…](https://mymerci.kr/pages/nclex_q.php?qn_id=542374) - [A 12-year-old child with juvenile idiopathic arthritis (JIA) is experiencing a flare-up wi…](https://mymerci.kr/pages/nclex_q.php?qn_id=542375) - [A 14-year-old adolescent with juvenile idiopathic arthritis (JIA) is experiencing morning …](https://mymerci.kr/pages/nclex_q.php?qn_id=542376) --- More free questions: [기출문제](https://mymerci.kr/) _학습 참고용입니다. 실제 임상은 최신 지침과 소속 기관 프로토콜을 따르세요._