✅ Knee MRI Mastery405 (Fig 3-B.02) Posterolateral Capsular Support Structures https://youtu.be/2-8svU3ZuTohttps://youtu.be/6WOItzqJj1g 📌 Overview of Posterolateral Knee Structures✅ Fibular Head AttachmentsImportant anchor for posterolateral corner structuresAttachment for lateral collateral ligament (LCL) and biceps femoris tendon anteriorly and posteriorly ✅ Biceps FemorisLong head tendon merges with LCL 1cm above fibular headInserts as conjoined tendon on lateral fibul.. 2024. 5. 20. (Fig 3-B.01) Three-Layer Approach to Lateral Knee https://youtu.be/o27uL_qEKq8https://youtu.be/6WOItzqJj1g 📌 The Posterolateral Corner of the Knee: Three-Layer Approach 1️⃣ Superficial Layer (First Layer)Lateral fasciaIliotibial bandBiceps femoris tendon 2️⃣ Middle Layer (Second Layer)Patellar retinaculumPatellofemoral ligamentPatellomeniscal ligament 3️⃣ Deep Layer (Third Layer)Lateral collateral ligament (fibular collateral ligament)Lateral .. 2024. 5. 19. (Fig 3-A.53) MCL Bursitis ⎜Distinguishing from Grade I MCL Injury https://youtu.be/YI6RTE_YrMwv ✅ Anatomy of the MCL BursaLocated between superficial and deep portions of the MCL along the middle third of the knee jointMay be single or multi-compartment✅Imaging Findings of MCL BursitisWell-defined fluid collectionMay extend into femoral/tibial compartments adjacent to cortexAnterior margin adjacent to MCLPosterior margin at MCL-deep capsular ligament junctionF.. 2024. 5. 15. (Fig 3-A.52) Semimembranosus-Gastrocnemius Bursa: Baker Cyst, Synovial Osteochondromatosis https://youtu.be/bI3QDvI_rS8https://youtu.be/GSIg93UH3Oc 📌 Semimembranosus-Gastrocnemius Bursa: Baker CystNormally enlarges along medial gastrocnemius muscle distallyCan enter muscle compartment if fascial defect or weak region presentDissecting cyst may present as tender fullness below knee jointRare instance of cyst present both outside and within muscle compartment📌 Synovial Osteochondromat.. 2024. 5. 15. (Fig 3-A.51) Semimembranosus Bursitis https://youtu.be/LNGTlEcwN4ghttps://youtu.be/GSIg93UH3Oc 📌Semimembranosus Bursa:Horseshoe-shaped synovial bursa around the semimembranosus tendon near posteromedial tibial rimInflamed/distended bursa presents as a synovial-lined space wrapping the tendonDemonstrates characteristic reverse 'J' shape or 'inverted-U' shape on imaging✅Direct Arm of Semimembranosus TendonPrincipal attachment of the .. 2024. 5. 15. (Fig 3-A.50) Pes Anserine Bursitis https://youtu.be/0O2v9TRYmZ0https://youtu.be/GSIg93UH3Oc 📌Pes Anserinus BursitisPes anserinus bursitis refers to inflammation of the bursa located deep to the conjoined tendons (pes anserinus) on the medial aspect of the knee.✅ Anatomic ConsiderationsBursa does not communicate with knee joint cavityLocated deep to semitendinosus, gracilis, and sartorius tendonsMost frequently distal to joint li.. 2024. 5. 14. (Fig 3-A.48) Osteomeniscal Impingement https://youtu.be/z9fsWoAlM2Ehttps://youtu.be/GSIg93UH3Oc 📌 Osteomeniscal Impingement and Impact EdemaOsteomeniscal impingement, also known as osteomeniscal impact edema (OIE), is a distinct condition characterized by a peripherally displaced flap tear of the medial meniscus with adjacent reactive bone marrow edema. Displacement into the inferior medial gutter is more common than superior displa.. 2024. 5. 14. (Fig 3-A.47) Extra-Capsular Medial Tibial Crest Friction https://youtu.be/Mvcy1pMse3khttps://youtu.be/GSIg93UH3Oc 📌 Extra-Capsular Medial Tibial Crest Friction✅ Clinical PresentationThe condition is predominantly seen in young adults with a high level of physical activity, particularly athletes.Patients typically complain of pain and tenderness approximately 2.5 cm below the medial joint line.✅ Imaging FindingsIt is suggested that prominence of the m.. 2024. 5. 14. (Fig 3-A.46) Adhesive Capsulitis of the knee https://youtu.be/a606_BRVd4Yhttps://youtu.be/GSIg93UH3Oc 📌Adhesive CapsulitisAdhesive capsulitis (AC) is a condition characterized by synovial inflammation and capsular fibrosis, leading to fibroblastic infiltration, adhesion, and retraction of the capsule. It was traditionally associated with the glenohumeral (shoulder) joint, but recent evidence suggests it can affect other joints as well.✅ M.. 2024. 5. 14. (Fig 3-A.45) Posteromedial Knee Friction Syndrome https://youtu.be/ny6AD-kQCCohttps://youtu.be/GSIg93UH3Oc 📌 Iliotibial Band SyndromeCommon cause of lateral knee pain related to intense physical activityResults in chronic inflammation of fat adjacent to iliotibial band✅MRI Findings of Iliotibial Band SyndromeIll-defined signal abnormality within fatty soft tissues between iliotibial band and boneIn the knee: Low T1 and high T2 signal in soft t.. 2024. 5. 14. (Fig 3-A.44) O’Donoghue’s Pentad Lesion https://youtu.be/G6zvs91kWgEhttps://youtu.be/GSIg93UH3Oc 📌O'Donoghue's Unhappy TriadThe O'Donoghue unhappy triad refers to a combined injury involving three specific structures: the anterior cruciate ligament (ACL), the medial collateral ligament (MCL), and the medial meniscus.📌Expansion to Tetrad and Pentad LesionsTetrad Lesion: When there is an additional injury to the Medial Patellofemoral .. 2024. 5. 13. (Fig 3-A.43) O'Donoghue’s Triad Lesion https://youtu.be/hlnrlmZ1U_Qhttps://youtu.be/GSIg93UH3Oc 📌 Case study: O'Donoghue's TriadThe O'Donoghue unhappy triad refers to the combined injury of the anterior cruciate ligament (ACL), medial collateral ligament (MCL), and meniscusOriginally described with medial meniscal injury, but lateral meniscal tears more common when ACL and MCL injuries coexistOccurs from contact or non-contact injur.. 2024. 5. 13. (Fig 3-A.42) Oblique Popliteal Ligament Injury https://youtu.be/Dr094F2Y_OQhttps://youtu.be/GSIg93UH3Oc 📌 Injury to the Oblique Popliteal LigamentInjury is usually best seen on axial and sagittal planesDifficult to visualize the intact ligament directlyInferred from injury to the posterior joint capsuleSigns include irregularity, thickening, disruption of the posterior capsule/OPL and surrounding edemaEdema and irregularity of the posterome.. 2024. 5. 13. (Fig 3-A.41) Oblique Popliteal Ligament MRI Anatomy https://youtu.be/k22CIhpyVMshttps://youtu.be/GSIg93UH3Oc 📌Oblique Popliteal LigamentA broad component extends into the OPL, which courses along the posterior capsule of the knee.Laterally, the OPL attaches to the fabella, meniscofemoral portion of the posterolateral joint capsule, and plantaris muscle.On coronal imaging, the OPL appears as an obliquely oriented thick band.While sometimes thin, .. 2024. 5. 13. (Fig 3-A.40) Semimembranosus Tendon and OPL Anatomy https://youtu.be/yyEzqE2Coswhttps://youtu.be/GSIg93UH3Oc 📌 Oblique Popliteal LigamentThe oblique popliteal ligament (OPL) originates medially from the merging of the semimembranosus's lateral expansion and the capsular arm of the popliteus ligament (POL). Laterally, it attaches to the fabella, the meniscofemoral portion of the posterolateral joint capsule, and the plantaris muscle. The OPL, a l.. 2024. 5. 13. (Fig 3-A.39) Fat Accumulation in Semimembranosus Tendon https://youtu.be/TxXjoJqDCNAhttps://youtu.be/GSIg93UH3Oc ✅Fat Accumulation in Semimembranosus Tendon In the semimembranosus tendon, tendinosis is characterized by a thickened tendon and increased signal intensity. However, fat within a normal tendon is considered a normal variant and should not be confused with tendinosis.Radiographics. 2015 Jul-Aug;35(4):1123-37 "Visualizing MSK Radiology: A Pr.. 2024. 5. 12. (Fig 3-A.38) Semimembranosus Tendinopathy: Part 2 https://youtu.be/mqcE9mq-k94https://youtu.be/GSIg93UH3Oc ✅ Semimembranosus Tendon Insertion InjuriesRepetitive Stress Causes Insertion AbnormalitiesInsertional TendinosisDistal Semimembranosus Insertional TendinosisChronic Repetitive Stress Leads to Insertion Changes✅Repetitive Stress Causes Insertion AbnormalitiesRepetitive injury and stress at the insertion site result in irregularity and cyst.. 2024. 5. 12. (Fig 3-A.37) Semimembranosus Tendinopathy: Part 1 https://youtu.be/Vlz0lKGOUcUhttps://youtu.be/GSIg93UH3Oc ✅ Semimembranosus Insertion InjuriesInjuries at the distal semimembranosus insertion are observed in up to 70% of posteromedial corner injuries. These can range from avulsion fractures at its tibial attachment to partial or complete tendon tears, as well as tendinosis. ✅ Pathophysiology of TendinosisTendinosis in this context is often the.. 2024. 5. 12. (Fig 3-A.36) Magic Angle Artifact in Semimembranosus Tendon https://youtu.be/9eTKLkPiK9Ihttps://youtu.be/GSIg93UH3Oc 📌Magic Angle Artifact in MRI ImagingThe magic angle effect occurs due to the specific angulation of the anterior arm of the tendon when the knee is extended. This positioning can result in a focal area of high signal intensity on MRI images.✅ This artifact is most commonly observed in sequences with short echo time (TE), such as:T1-weight.. 2024. 5. 12. (Fig 3-A.35) Semimembranosus Arms with Bursitis: Anterior, Direct, Inferior https://youtu.be/fEW4WagXOs8https://youtu.be/GSIg93UH3Oc 📌 Case study✅Semimembranosus Bursitis OverviewThe semimembranosus bursa, a horseshoe-shaped synovial bursa, is located around the semimembranosus tendon near the posteromedial tibial rim. When inflamed, it forms a synovial-lined space that wraps the tendon, visible as a characteristic reverse 'J' shape on imaging.✅Direct Arm AnatomyThe Di.. 2024. 5. 12. (Fig 3-A.34) Anterior and Direct Semimembranosus Arms https://youtu.be/X4EXbWCrTTMhttps://youtu.be/GSIg93UH3Ochttps://youtu.be/GSIg93UH3Oc 1️⃣Direct Arm (Principal Attachment):Attaches directly to the posteromedial aspect of the tibia, just distal to the joint line, in a groove known as the tuberculum tendinis.Forms a C-shaped, 5-mm-thick band with the anterior arm along the posteromedial tibia, difficult to distinguish from each other.Exhibits hyp.. 2024. 5. 12. 이전 1 ··· 5 6 7 8 9 10 11 ··· 20 다음
