Tendinosis of the anterior tibial tendon.

A 74 year-old male reported left ankle pain and swelling. Axial T1-weighted (left) and fast spin echo T2-weighted (right) images through the navicular and distal anterior tibial tendon demonstrate thickening of the tendon (arrows), measuring 8 mm in short axis. A coronal fat saturated fast spin echo proton density-weighted image (bottom) shows the diffuse thickening extending to the distal insertion on the medial first cuneiform. The tendon remains normal in signal on all imaging sequences.

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