What is a characteristic finding in juvenile idiopathic arthritis upon examination?

Morning stiffness is a characteristic finding in juvenile idiopathic arthritis (JIA), as it reflects the inflammation present in the joints. In JIA, children often experience stiffness after periods of inactivity, such as overnight sleep, which can improve with activity throughout the day. This stiffness can significantly impact their ability to move and engage in daily activities, making it an important indicator of the disease.

The presence of morning stiffness, particularly when it persists for more than 30 minutes, is a key symptom that helps differentiate JIA from other conditions. The stiffness arises due to joint inflammation, which is a hallmark of the disease, resulting in pain and reduced range of motion upon waking.

Other options, while they may occur in JIA or resemble symptoms of other conditions, do not specifically align as clearly with the characteristic presentations of juvenile idiopathic arthritis as morning stiffness does. For instance, symmetrical joint pain can occur in various conditions, a scaly skin rash may suggest other dermatological or autoimmune diseases, and a decreased appetite is common in many pediatric illnesses and is not specific to JIA.