MSK MRI

Stage I • Bone marrow edema due to ischemic damage without morphological changes • Normal density of the lunate in radiography and attenuation at CT scan • Low signal intensity on T1-weighted images and usually hyperintense on T2-weighted fat-suppressed images. Stage II • Sclerosis of the lunate bone due to chronic ischemic damage • Increased density in radiography with preserved morphology • CT..

Innervation Supraspinatus muscle : suprascapular nerve (C5,6) Infraspinatus muscle : suprascapular nerve (C5-6) Teres minor muscle : axillary nerve (C5-6) Subscapularis muscle : upper and lower subscapular nerves (C5-6) Deltoid muscle : axillary nerve (C5-6) Triceps brachii muscle: radial nerve, branches of ulnar nerve Teres major muscle : lower subscapular nerve (C5, C6) Teres minor muscle : ax..

Supraspinatus calcific tendinitis is well known; However, calcific deposits may occur less commonly in other structures in and around the shoulder joint (The long head of the biceps tendon, labrum, and periarticular soft tissue). In view of involvement of these other sites, the more appropriate term for the condition is calcific periarthritis Small calcifications may sometimes be missed, especia..

The nondisplaced component of a flap tear may demonstrate a changing slope contour of its superior surface. Criteria for diagnosis of a flap tear based on sagittal images include: * A vertical tear encompassing the inner third of the meniscus,either coapted or noncoapted * Relative deficiency of the inner third of the inferior meniscal surface with associated blunting of the remaining inferior l..

The flexor retinaculum is often torn in conjunction with a tear of the superficial deltoid ligament, or in association with ankle fracture. Tears of the flexor retinaculum have been described in association with tibialis posterior tendon dislocation. An isolated tear of the flexor retinaculum is rare. “Fascial sleeve of the medial malleolus,” is composed of the superficial deltoid origin, the me..

The spectrum of tears ranges from microtears to interstitial tears (parallel to the long axis of the Achilles), to partial tears, and eventually to complete tears (ruptures). Typically, in a young 'normal' individual, the Achilles tendon ruptures in the 'critical zone’, which is a region of relative watershed hypovascularity 2-6 cm proximal to insertion. The Achilles tendon tear classification i..

Treatment of avulsion fractures of the PCL depends on the degree of avulsion fracture displacement. Conservative therapy is generally performed if the degree of avulsion fracture displacement is mild, whereas surgery is performed in patients with significant displacement and posterior tibial instability. In the past, internal fixation was highly invasive, requiring a marked opening of the back o..

Acute calcific periarthritis (ACP) is a self-limiting, monoarticular, peri-articular process of dystrophic mineral deposition and adjacent inflammation. The majority of cases involve the shoulder. Less commonly, there may be involvement of the hip, knee, ankle, foot, elbow, wrist, and fingers. Patients present with a sudden onset of pain, localized swelling, erythema, tenderness, and restricted ..

The prestyloid recess is a synovial-lined pouch with a direct connection to the rest of the radiocarpal compartment. It is most commonly a saccular space bordered by the meniscal homologue distally, the TFCC attachments to the ulnar styloid process proximally, and the central TFCC disk radially There are several variations in the shape of the prestyloid recess. Prestyloid recess is best seen on ..

The prestyloid recess is a synovial-lined pouch with a direct connection to the rest of the radiocarpal compartment. It is most commonly a saccular space bordered by the meniscal homologue distally, the TFCC attachments to the ulnar styloid process proximally, and the central TFCC disk radially There are several variations in the shape of the prestyloid recess. Prestyloid recess is best seen on ..