Presentation
Pain and swelling at the medial and lateral ankle for several months. X-rays inconspicuous.
Patient Data
Intrasynovial well-defined soft tissue lesions are noted at the ankle joint with low signal intensity on T1 and T2 and heterogeneous postcontrast enhancement with associated underlying bone erosions notably in the body of talus in keeping with diffuse pigmented villonodular synovitis.
Flexor hallucis longus tendon shows a tenosynovial well-defined lesion with lobulated outline exhibiting same signal characteristics as the ankle joint lesions in keeping with tenosynovial giant cell tumor.
Case Discussion
Radiological features are in favor of pigmented villonodular synovitis of the ankle joint and giant cell tumor of the flexor hallucis longus tendon sheath.
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