A 16-year-old boy arrives to your office soon after beginning basketball season. He states that he has had progressive pain in his knees. A physical examination reveals, in addition to tenderness, a swollen and prominent tibial tubercle. Radiographs of the area are unremarkable. Which of the following is the most likely diagnosis?
Osgood-Schlatter disease Popliteal cyst Slipped capital femoral epiphysis Legg-Calve-Perthes disease