Figure 2

Bone marrow lesion scores using magnetic resonance imaging. Sagittal and coronal views of short TI inversion recovery (STIR) images of the knee are taken. Bone marrow lesions (BMLs) are scored using the whole magnetic resonance imaging score, where A is scored as grade 0, B as grade 1, C as grade 2, and D as grade 3 in the medial femoral condyle.