Diffuse widening of the physis on coronal and axial T1-weighted images with diffuse widening of intermediate signal intensity circumscribed by a linear low signal margin.
Posteromedial slippage of the femoral epiphysis. Positive Klein's sign with a line drawn through the lateral aspect of the femoral neck does not bisect the femoral epiphysis.
Metaphyseal oedema with low T1 and high PDFS / STIR signal. This appears as metaphyseal focal sclerosis "metaphyseal blanch sign" on plain x-ray. Mild joint effusion; indicative of mild synovitis.
Incidentally noted is small bilateral inguinal lymphadenopathy.