Diagnostic value of ultrasound in Osgood-Schlatter disease: A case report of a 13-year-old athlete.

Osgood-Schlatter disease (OSD) is a common cause of anterior knee pain in adolescents, particularly those engaged in repetitive sports activities. While radiographic imaging can identify bony changes of the tibial tuberosity, it often fails to reveal soft tissue alterations that may appear early in the disease. We report the case of a young athlete presenting with unilateral anterior knee pain, in whom ultrasound played a pivotal role in confirming the diagnosis of OSD. The case highlights the diagnostic value of ultrasound in identifying tendon abnormalities, vascularization, and tibial tuberosity fragmentation-demonstrating the utility of sonography as a first-line modality for early diagnosis and clinical management of OSD.