MRI
There is a well-defined epiphyseal lesion located in posterior medial femoral condyle. This lesion show rounded lesion with intermediate to hypointense signal intensity on T1WI and T2WI, hyperintense signal on STIR and PD fat sat sequences. It is surrounded by hypointense T1/T2 rim. Additionally, there is adjacent bone marrow and soft tissue oedema as well as a mild joint effusion.