60-year-old female with pain at the posterior tibial tendon medially at the inferior aspect of the medial malleolus. Evaluate for tear. TENDONS: There is increased signal abnormality within the posterior tibialis tendon at the level of the medial malleolus consistent with tendinosis. There is circumferential fluid within the tendon sheath of the posterior tibialis tendon suggesting a mild tenosynovitis. There is a small amount of subcutaneous edema in the surrounding area. There is also increased bone marrow signal abnormality within the medial aspect of the talus underlying the posterior tibialis tendon likely reflecting reactive osteitis. The extensor tendons appear intact. The peroneal tendons appear intact. The Achilles tendon is normal in appearance.LIGAMENTS: The lateral collateral ligament complex appears intact. The distal tibiofibular syndesmotic complex appears intact. The imaged components of the deltoid ligament appear intact.ARTICULAR SURFACES AND BONE: There is increased signal abnormality within the talus underlying the posterior tibialis tendon which likely represents a reactive osteitis. Moderate to severe degenerative changes affect the talonavicular joint with osteophyte formation and joint space narrowing and degenerative subchondral signal abnormality. Degenerative osteoarthritic changes affect the midfoot articulations. There is subchondral cyst formation within the lateral aspect of the tibial plafond.ADDITIONAL
1. Findings consistent with posterior tibialis tendon tendinosis and tenosynovitis. Other findings as described above.2. Findings consistent with sinus tarsi syndrome.