What is the MRI appearance of tendon abnormalities? • Tendinopathy: This refers to degeneration of a tendon, which typically results from overuse. The affected tendon will be intermediate to high in signal intensity on T2 weighted images but not as high in signal intensity as with a tendon tear. • Partial tear: This appears as a linear …
Which bones form the hindfoot midfoot and forefoot? The hindfoot is composed of the calcaneus and talus. The midfoot is composed of the navicular, cuboid, and three cuneiforms (medial, middle, and lateral). The forefoot is composed of the metatarsals and phalanges (proximal, middle, and distal).
What are the compartments of the ankle joint, and what structures do they contain? The ankle joint contains four compartments: Anterior, medial, lateral, and posterior. • Anterior compartment: From medial to lateral, the anterior compartment contains the anterior t ibialis tendon, extensor h allucis longus tendon, peroneal nerve, dorsalis pedis artery, and extensor d igitorum longus tendon. The tendons in the anterior …
Where is a popliteal (Baker) cyst located, and what is its significance? A popliteal cyst is a bursa that is contiguous with the knee joint in the posterior knee. It usually herniates between the tendons of the medial head of the gastrocnemius muscle and the semimembranosus muscle. Rupture of a popliteal cyst can be symptomatic …
What is subchondral insufficiency fracture of the knee? Describe its MRI appearance. Subchondral insufficiency fracture of the knee is characterized by sudden onset of pain in the absence of trauma. It usually involves the weight-bearing surfaces and most commonly occurs in the central weight-bearing surface of the medial femoral condyle. In contrast to OCD, this …
What are the MRI features of an unstable OCD fragment? MRI is the modality of choice for evaluating these lesions. Signs of an unstable fragment can be seen on T2-weighted images and include the following: • A fluid signal intensity rim surrounding the fragment. • Cystic foci between the fragment and the host bone. • A defect in …
MRI findings of patellar tendinitis Patellar tendinitis, also known as jumper’s knee, is an overuse syndrome usually seen in young athletes who participate in activities requiring jumping such as basketball or volleyball. In contrast, quadriceps tendon injury is more commonly seen in older populations. The intrasubstance degeneration of the tendon is seen as thickening and …