43-year-old female patient with left ankle pain with dorsiflexion. Evaluate for synovitis, mechanical injury, or anatomic abnormality. The tibiotalar and subtalar joints appear normal.There is poorly defined enhancement of the sinus tarsus extending laterally along the head of the talus. There is additional poorly defined enhancement along the medial aspect of the head/neck of the talus as well as surrounding the distal posterior tibialis tendon indicating synovitis. The tendons of the ankle otherwise appear normal. The ligaments of the ankle appear grossly intact.Small talonavicular joint osteophytes indicate mild osteoarthritis. There is mild edema within the subcutaneous fat along the medial malleolus which is nonspecific.
Mild synovitis adjacent to the talus and other findings as described above.