By showing poor correlation between plain radiography, MRI, and hip arthroscopy, the authors make a convincing argument for direct inspection of the femoral head when MRI shows stage IV disease.

MRI outcomes were incomplete due to claustrophobia or movement ... In the skeletally immature hip, the ossified femoral head is small relative to the metaphysis, giving rise to raised bone alpha ...

The 32 bone contusions (16 kissing contusions) were located as follows: lateral femoral condyle ... All the MRI sequences were analysed by two independent examiners—one senior radiologist and the head ...