A 7 year old male presents with symptoms of groin pain, thig…
A 7 year old male presents with symptoms of groin pain, thigh pain, and a limp that began 3 months ago. You examine the child and note decreased range of motion in the affected lower extremity. A radiograph shows ossification of the nucleus of the femoral head and a widened articular cartilage space when compared with the opposite head. These symptoms should most likely lead to a diagnosis of