MRI appearance of plantar fasciitis The plantar fascia originates from the calcaneus and is composed of three bands: the medial, central, and lateral bands. The central band is the largest and most commonly involved in the setting of plantar fasciitis. Normally, the plantar fascia is a thin band, which is low in signal intensity on …
What is tarsal coalition, and where does it occur? Tarsal coalition refers to abnormal congenital bridging between the tarsal bones of the foot. This bridging, or nonsegmentation, can be fibrous, cartilaginous, or osseous. The two most common types of tarsal coalition are the talocalcaneal coalition and the calcaneonavicular coalition. The talocalcaneal coalition occurs on the …
What are the most common sites of avascular necrosis in the ankle? The three areas in the ankle that are susceptible to avascular necrosis are the talar dome, the second or third metatarsal heads, and the lateral hallux sesamoid. In the setting of a talar neck fracture, there is often compromise of the quite variable …
Most common sites of avascular necrosis in the ankle Read More »
How does an osteochondral lesion occur? An osteochondral lesion, previously known as osteochondritis dissecans, occurs secondary to inversion or eversion injuries of the ankle, and is a direct result of the tibia contacting the talar dome. As the name implies, there is injury both to the bone and the overlying hyaline articular cartilage. MRI is …
Which ligaments are injured during ankle eversion? The medial ankle ligaments are injured during ankle eversion. The medial ankle ligaments are referred to collectively as the deltoid ligament complex, which is composed of superficial and deep components. The lateral ankle ligaments are injured much more commonly than the medial ligaments.
Which ligaments are injured during ankle inversion? The lateral ankle ligaments are injured during ankle inversion. The lateral ankle ligaments are composed of the anterior talofibular ligament, calcaneofibular ligament, and posterior talofibular ligament. The anterior talofibular ligament is the first ligament to tear during ankle inversion and is therefore the most commonly injured ligament. A …
Which ligaments are injured during ankle inversion Read More »
What is the MRI appearance of Achilles tendon rupture? Achilles tendon ruptures are commonly seen following sports-related injuries and most frequently seen in men between the ages of 30 and 50. Patients usually report a “pop” during forceful dorsiflexion. On MRI, sagittal images are the most helpful to make this diagnosis. The tendon tear usually …