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A well-defined soft tissue mass lesion measuring 3.0 x 3.0 x 5.0 cm is seen just anterior to the right ankle joint. This lesion has heterogeneous T1 and T2 signal intensity and well-defined outer margins showing smooth pressure erosions on the talar neck and distal anterior tibia. No fat component, hemorrhage, or calcifications are seen in it. The lesion shows significant enhancement in the post-contrast study and central degeneration. No bone marrow edema is seen in the underlying bones. No abnormal ankle joint effusion is seen. The supporting ligaments of the ankle are preserved.