Right foot pain Tendons and ligaments: The visualized extensor tendons are intact. The visualized flexor tendons are intact. The peroneal tendons are intact. The Lisfranc ligament is intact. Osseous structures: There is irregular hyperintense T2 signal and markedly decreased T1 signal involving the lateral half of the navicular bone consistent with avascular necrosis. There is secondary moderate osteoarthritic changes of the talonavicular articulation with additional areas of increased signal abnormality within the anterior talus, cuboid, and peroneal tubercle. There is no joint effusion. There are no osteochondral lesions identified. There is normal alignment of the metatarsals. Muscles: The plantar musculature is unremarkable.Bone Marrow: The bone marrow signal is normal. There is no fracture or contusion. There is no marrow replacing lesions.
1. Avascular necrosis of the navicular. Additional areas of signal abnormality are noted within the foot which may represent reactive edema or early infarct.2. Moderate osteoarthritis of the midfoot particularly at the talonavicular articulation.