Which finding in an exam suggests a possible diagnosis of transient synovitis?

Limited internal rotation of the hip is a key finding that suggests a possible diagnosis of transient synovitis. This condition often affects children and is characterized by inflammation of the hip joint, which leads to pain and restricted movement. When examining a child suspected of having transient synovitis, the evaluation of hip motion is critical. Internal rotation may be particularly affected due to the pain associated with the condition.

When there is limited internal rotation, it indicates that the hip joint may be compromised, reflecting the underlying inflammation and resulting pain response. This contrasts with other findings that, while they may occur in various conditions, do not specifically point to transient synovitis. For example, swelling of the knee can be seen in multiple joint disorders, and a history of recent fever may indicate other infectious processes that are not limited to transient synovitis. Similarly, joint effusion is a common finding in various joint pathologies and doesn't specifically indicate transient synovitis. The limitation of internal rotation, however, strongly correlates with the diagnosis in this particular clinical context.