PMC8320545_01
Anterior view of the left ankle joint with swelling.
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On examination, his left ankle joint was swollen without tenderness or warmth (Figure 1).
Anteroposterior and lateral views of left ankle joint showing narrowed joint space and subtalar joint involvement.
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X-ray of the ankle region showed irregular outline at ankle mortise and loss of joint space with an irregular articular outline at subtalar joint (Figure 2).
MR image of the ankle joint showing marked loss of articular cartilage with associated bone marrow oedema in the subarticular region of the distal tibia.
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The magnetic resonance imaging (MRI) showed a marked loss of articular cartilage with associated bone marrow oedema in the subarticular region of distal tibia extending to distal metaphyseal region (Figure 3).