20-year-old male with talonavicular erosive arthritis TENDONS: No significant abnormality noted.LIGAMENTS: The lateral collateral ligament complex is intact. ARTICULAR SURFACES AND BONE: Again seen is talonavicular arthritis and erosions along the talar head and neck as well as the superior aspect of the navicular. There is increased abnormal T2 signal compatible with bone marrow edema throughout the navicular relative to the prior exam. A small amount of fluid is noted within the superior and lateral aspect of the talonavicular joint.Arthritic changes are also seen along the medial facet of the subtalar joint with subchondral sclerosis, cysts, and reactive bone marrow edema. Interval decrease in bone marrow edema within the medial talus.ADDITIONAL
Interval worsening of the talonavicular joint arthritis as described above. No significant change in subtalar joint arthritis. Findings compatible with erosive arthritis and synovitis or consider reactive arthritis. 