✅ Knee MRI Mastery/Chap 3.Collateral Ligaments85 (Fig 3-B.40, 41) Anterolateral Ligament Reconstruction https://youtu.be/u9UvwwCb2EUhttps://youtu.be/6WOItzqJj1g 📌Anterolateral Ligament (ALL) Reconstruction The Anterolateral Ligament (ALL) is an important secondary stabilizer that resists excessive internal rotation and anterior tibial translation. Combined ACL and ALL reconstruction may lead to lower graft failure rates and improved patient outcomes.✅ALL Reconstruction Technique:Femoral tunnel: S.. 2024. 5. 25. (Fig 3-B.38, 39, 42) Posterolateral Corner Reconstruction https://youtu.be/_pQgDx_WxNMhttps://youtu.be/6WOItzqJj1g 📌 Posterolateral Corner (PLC) Injury Treatment✅ Treatment OverviewHigh-grade PLC injuries are best treated with reconstruction rather than repair. The lateral collateral ligament (LCL), popliteus tendon (PT), and popliteofibular ligament (PFL) are key reconstruction focus areas. ✅ Acute Injury ManagementGrade I and II: Use a knee brace in.. 2024. 5. 24. (Fig 3-B.37) Anterior Medial Tibial Plateau Rim Fracture https://youtu.be/3c9r0Bej_qUhttps://youtu.be/6WOItzqJj1g 📌 Anterior Medial Tibial Plateau Rim FractureFractures of the peripheral anterior margin of the medial tibial plateau are associated with posterolateral corner (PLC) injuries and can serve as an important indicator of potential PLC injury.One study reported a 35% incidence of these tibial plateau fractures in patients clinically suspected.. 2024. 5. 24. (Fig 3-B.36) Fibular Head Avulsion Fractures https://youtu.be/GTBgnOW9uqMhttps://youtu.be/6WOItzqJj1g 📌 Arcuate Fractures and Posterior Lateral Corner (PLC) InjuriesIntroduction Certain osseous injuries, known as arcuate fractures or the arcuate sign, provide diagnostic clues for an underlying PLC injury, alerting radiologists to inspect this region closely. (Rosenberg et al., 2016) ✅ Avulsions of the Arcuate ComplexThe most common patter.. 2024. 5. 24. (Fig 3-B.35) Fibula Head Attachments Anatomy https://youtu.be/mhM5XFt8Lhohttps://youtu.be/6WOItzqJj1g ✅ The Importance of the Fibular HeadThe fibular head acts as a crucial anchor for the various supportive structures of the posterolateral corner of the knee joint.Certain bony injuries, such as avulsion fractures of the fibular head (also known as arcuate fractures or the arcuate sign), can provide diagnostic clues for an underlying poster.. 2024. 5. 24. (Fig 3-B.34) Iliotibial Band Friction Syndrome https://youtu.be/nw0YI0bKiHMhttps://youtu.be/6WOItzqJj1g 📌 Iliotibial Band Friction SyndromeIliotibial band friction syndrome is a common cause of lateral knee pain associated with intense exercise, such as long-distance running, football, and cycling. It results from chronic friction between the iliotibial band and the lateral femoral condyle during knee flexion.✅ MRI FindingsMRI often shows i.. 2024. 5. 24. (Fig 3-B.33) Iliotibial Band Injury from Acute Trauma https://youtu.be/Ji7iPJOMLkQhttps://youtu.be/6WOItzqJj1g 📌Iliotibial Band (ITB) Injury in Acute Knee Trauma ✅ Association with ACL Tear and Patellar DislocationIn up to two-thirds of cases of IT tract injury, the ACL will also be torn. In up to 20% of cases, patellar dislocation will also have occurred. Injury to the ITB is usually an indicator of significant internal derangement, with a strong.. 2024. 5. 23. (Fig 3-B.32) Iliotibial Band Anatomy https://youtu.be/WHA4VsgAQBwhttps://youtu.be/6WOItzqJj1g 📌 Iliotibial Band AnatomyThe iliotibial band (ITB or IT band) is a thick band of fascia along the lateral aspect of the thigh, representing a thickening of the fascia lata.Distal InsertionsAt least 5 distal insertions have been described around the lateral knee, attaching to the distal femur, patella, proximal tibia, and joint capsule.✅Su.. 2024. 5. 23. (Fig 3-B.31) Anterolateral rotary instability https://youtu.be/Y9CU2wiAixMhttps://youtu.be/6WOItzqJj1g 📌 Anterolateral rotatory instability (ALRI)A varus force combined with internal rotation of the tibia can cause an ACL tear. It may be linked to a Segond fracture (avulsion of the lateral tibial rim where the lateral capsular ligament attaches) (Magn Reson Imaging Clin N Am 22 (2014) 557–580). ALRI is a combined anterior translation and i.. 2024. 5. 23. (Fig 3-B.29) Segond Fracture https://youtu.be/K_L9kezvyfUhttps://youtu.be/6WOItzqJj1g 📌 Segond Fracture and Its Relationship with Anterolateral Ligament✅ Segond FractureA specific avulsion fracture on the lateral aspect of the proximal tibia, near the tibial plateau.Typically thin, ovoid, and vertically oriented, located anterolaterally or laterally along the lateral tibial plateau, posterior to Gerdy's tubercle.Reference.. 2024. 5. 23. (Fig 3-B.28) Proximal Anterolateral Ligament Tear https://youtu.be/xqhmZSqq3_Ehttps://youtu.be/6WOItzqJj1g ✅ Anatomical Location and StructureCapsular ligament located in the deepest (third) layer of the lateral aspect of the kneeFemoral origin is located posterior and proximal to the lateral collateral ligament (LCL)(Skeletal Radiology (2020) 49:1037–1049) ✅ Visibility on ImagingVariable visibility, ranging from 51% to 100% of casesDistal ti.. 2024. 5. 23. (Fig 3-B.26) Anterolateral Ligament Anatomy https://youtu.be/DAuBf43mm2Ahttps://youtu.be/6WOItzqJj1g 📌Overview of the Anterolateral Ligament (ALL)The Anterolateral Ligament (ALL) is a capsular ligament located in the deepest lateral layer of the knee, deep to the iliotibial band (ITB). It has an oblique anterior and inferior course, inserting on the lateral meniscus and lateral tibial condyle.✅ ALL InsertionsThe ALL has 3 main insertions.. 2024. 5. 22. (Fig 3-B.25) Biceps Femoris Tendinosis and Associated Bursitis https://youtu.be/pBkCSgwehK4https://youtu.be/6WOItzqJj1g 📌 Lateral/fibular collateral ligament-biceps femoris bursitis (LCL bursitis)The FCL-biceps femoris bursa is superficial to the distal FCL and deep to the biceps femoris anterior arm. On axial MRI, it has an inverted J-shape surrounding the FCL: the long arm along the lateral FCL aspect, the hook around the FCL's anterior edge. Proximally .. 2024. 5. 22. (Fig 3-B.24) Distal Biceps Femoris Myotendinous Junction Tear https://youtu.be/VauF4m8PmIkhttps://youtu.be/6WOItzqJj1g 📌 MRI Grading Systems Initial MRI grading systems relied on the pattern of muscle signal intensity alterations to classify muscle injuries into grades:Grade 0: Symptomatic injury without MRI findingsGrade 1: Edema only, without architectural distortionGrade 2: Architectural distortion with intramuscular hemorrhage and tissue gapsGrade 3: .. 2024. 5. 22. (Fig 3-B.23) Anatomy of Biceps Femoris Arms: Direct and Anterior https://youtu.be/ivHVNJxEIcMhttps://youtu.be/6WOItzqJj1g 📌 Anatomy of the Biceps Femoris Tendon Distal Biceps Femoris Tendon The distal tendon of the biceps femoris merges with the lateral collateral ligament (LCL) 1 cm above the fibular head, inserting as a single conjoined tendon onto the lateral aspect of the fibular head. The LCL inserts anteriorly and the biceps femoris tendon inserts post.. 2024. 5. 22. (Fig 3-B.22) Arcuate and Fabellofibular Ligament Tears https://youtu.be/4_L3OANdAmQ https://youtu.be/6WOItzqJj1g ✅ Fabellofibular LigamentOriginates from the fabella, runs vertically parallel to the lateral collateral ligament, and attaches to the fibular styloid process. ✅ Arcuate LigamentThickening/reinforcement of the posterolateral capsuleY-shaped, runs to the apex of the fibular styloid processLateral limb attaches to lateral femoral condyle an.. 2024. 5. 22. (Fig 3-B.20) Arcuate Ligament Anatomy https://youtu.be/jLnEc_qm47Mhttps://youtu.be/6WOItzqJj1g 📌 Anatomy of the Arcuate LigamentY-shaped thickening of the posterolateral capsuleRuns to apex of fibular styloid processLateral limb attaches to lateral femoral condyle and posterolateral joint capsuleMedial limb attaches to posterior knee capsule and oblique popliteal ligament ✅ Variability and VisualizationVariably present structureDif.. 2024. 5. 22. (Fig 3-B.19) Fabellofibular Ligament Anatomy https://youtu.be/zFj37peR_bMhttps://youtu.be/6WOItzqJj1g 📌 Fabellofibular LigamentAppearance The fabellofibular ligament appears as a focal thickening of the distal edge of the capsular arm of the short head of the biceps femoris muscle. Together with the arcuate ligament, the fabellofibular ligament functions as a static stabilizer and a restraint to external rotation, varus angulation and pos.. 2024. 5. 22. (Fig 3-B.18) Popliteofibular Ligament Avulsion Fracture https://youtu.be/bDJM8k2UzN0https://youtu.be/6WOItzqJj1g 📌Attachments to the Fibular HeadBiceps femoris tendon and lateral collateral ligament attach laterallyArcuate and fabellofibular ligaments attach posteromediallyPopliteofibular ligament attaches most medially ✅ Fibular Head Fractures as Clues to PLC InjuryAvulsion fractures of the fibular head (arcuate fractures/sign) occur at PLC compone.. 2024. 5. 22. (Fig 3-B.17) Partial Popliteofibular Ligament Tear https://youtu.be/9z_hs0scBT0https://youtu.be/6WOItzqJj1g 📌The Popliteofibular Ligament ✅ AnatomyThe popliteofibular ligament extends from the popliteus tendon near the myotendinous junction to the posteromedial aspect of the fibular styloid process, posteromedial to the biceps femoris tendon insertion.On coronal MRI images, the popliteofibular ligament can be identified just deep to the lateral.. 2024. 5. 22. (Fig 3-B.16) Popliteofibular Ligament Anatomy https://youtu.be/9XY2DxjmeYkhttps://youtu.be/6WOItzqJj1g 📌 Popliteofibular Ligament The popliteofibular ligament is a sturdy tendinous band that crucially stabilizes the posterolateral corner of the knee. It extends from the popliteus tendon to the posterior aspect of the fibular styloid process.★ Identifying the Popliteofibular LigamentOn coronal images, it can be identified deep to the latera.. 2024. 5. 22. 이전 1 2 3 4 5 다음
