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The MRI sequences demonstrate:
- narrowing of the tibiotalar joint space
- destruction of the tibial subchondral bone with focal metaphyseal lesions of intermediate signal on T1 and high signal on T2 centrally with hypointense peripheral rim and peripheral enhancement on postcontrast sequences.
- tibial bone marrow oedema surrounding the tibial lesions
- joint effusion with synovial thickening and enhancement
- oedematous infiltration of the perimalleolar soft tissues