33-year-old male with pain and swelling along the lateral aspect of foot TENDONS: There is increased signal intensity within the peroneus brevis tendon as it courses distal to the fibular tip, indicating moderate tendinosis. The tendon also appears abnormally flattened posterior and distal to the fibular tip, which we suspect represents incomplete longitudinal tearing. Fluid within the peroneal tendon sheath indicates mild tenosynovitis. A small amount of fluid extends distally along the peroneus longus tendon sheath, which otherwise appears intact. A small amount of fluid within additional medial tendon sheaths we suspect is of no current clinical significance. The tendons themselves appear normal. Fluid within the tibialis anterior tendon sheath may represent mild tenosynovitis. The tendon itself appears normal.LIGAMENTS: The ATFL and PTFL are intact. The calcaneofibular ligament appears slightly thickened, perhaps due to tendinopathy involving the adjacent peroneal tendon. The visualized tibiofibular ligaments appear intact. The visualized components of the deltoid ligament appear intact.ARTICULAR SURFACES AND BONE: We see no fracture or osteochondral defect. The bone marrow signal is within normal limits.
Tendinosis and partial longitudinal tearing of the peroneus brevis with associated tenosynovitis and other findings as described above.