A large well defined central medullary focal bony lesion is noted at the distal left femoral shaft, with the following features:
- it measures 3.1 x 2.7 x 5.2 cm in maximum dimensions
- it expresses heterogeneous T1 hypo and T2 hyperintense signal with intra-lesional T1 mixed hyper and hypointense and T2 hypointense foci
- no diffusion restriction in DWI
- it showed moderate heterogeneous post-contrast enhancement
- it showed lobulated outlines with marrow zone of transition and no surrounding marrow signal abnormalities
- intact overlying cortex
- no related periosteal reaction
- no extension to the nearby soft tissues
Also noted:
- thinned out retropatellar and medial femorotibial cartilage, with subchondral edematous marrow changes as well as marginal osteophytes noted, reflecting osteoarthrosis
- bulky lateral meniscus impending discoid formation showing transverse linear T2 hyperintense signal noted within its body reaching its superior articular surface reflecting horizontal tear
- radial tear at posterior horn medial meniscus interrupting its superior and inferior articular surfaces
- mild knee joint effusion
- thin T2 hyperintense signal noted superficial to the infrapatellar tendon, reflecting mild bursitis