Which characteristic finding is associated with Osgood Schlager disease?

The characteristic finding specifically associated with Osgood-Schlatter disease is pain that is reproduced by extending the knee against resistance. This condition is commonly seen in adolescents who are active in sports, particularly those that involve running, jumping, or climbing. The repetitive stress on the knee can lead to irritation and inflammation at the tibial tuberosity, where the patellar tendon attaches.

When a clinician performs a resisted knee extension test, increased discomfort at the site indicates the presence of this condition. The soreness is typically localized to the tibial tuberosity, and the pain may also worsen with activity. This symptomatology is a key clinical feature in diagnosing Osgood-Schlatter disease, which is often exacerbated by activities involving knee extension.

The other findings, although they may present in knee-related issues, do not specifically correlate with the unique pathology or symptom cluster of Osgood-Schlatter disease. For example, erythema and warmth could suggest an inflammatory process but are not classic indicators of this condition, while pain over the patellar tendon might lead towards other diagnoses such as patellar tendinitis. Additionally, a painless straight leg raise can indicate different pathologies that are not related to the irritation seen in Osgood-Schl