✅ Knee MRI Mastery/Chap 1. Meniscus103 (Fig 1-B.50) Medial Meniscocapsular Separation https://youtu.be/etzsZOc2Nhk https://youtu.be/nKQsItyKAtM 🔵🇰🇷Meniscocapsular Separations Vertical tears located just peripheral to the meniscus act similarly to soft tissue injuries, potentially causing instability in the meniscus. These kinds of injuries are known as meniscocapsular separations, which occur when the meniscus detaches from the capsule. More frequently observed on the medial side.. 2024. 2. 7. (Fig 1-E.49) Isolated Tear of popliteomeniscal fascicles https://youtu.be/ZuomNM5vc-Q https://youtu.be/nKQsItyKAtM 🔵🇰🇷Tear of popliteomeniscal fascicles When assessing a knee for a hypermobile lateral meniscus (LM), it's important for the radiologist to concentrate on the anteroinferior and posterosuperior popliteomeniscal fascicles (PMFs). This is because a total rupture or lack of these structures correlates with a significantly higher likelihood (w.. 2024. 2. 7. (Fig 1-B.48) Tear of popliteomeniscal fascicle associated with ACL tear https://youtu.be/IOGe7CeYy0w https://youtu.be/nKQsItyKAtM 🔴🇰🇷Summary of the popliteomeniscal fascicles: 1️⃣Anteroinferior Popliteomeniscal Fascicle: Originating at the lateral compartment's lateral aspect, this fascicle runs from the inferior aspect of the lateral meniscus posteroinferiorly and merges with the popliteofibular ligament fibers. 2️⃣Posterosuperior Popliteomeniscal Fascicle: Positio.. 2024. 2. 7. (Fig 1-B.47) Lateral meniscocapsular separation associated with fracture https://youtu.be/4hz6ZwEn2bQ https://youtu.be/nKQsItyKAtM 🔴🇰🇷Summary of the information regarding lateral meniscocapsular separation: 1️⃣Occurrence with Fractures and ACL Tear: Lateral meniscocapsular separation can occur alone or in conjunction with tibia or femur fractures or an ACL tear. The focus here is on cases where it occurs with lateral femoral condyle fractures. 2️⃣Injuries in Tibial P.. 2024. 2. 7. (Fig 1-B.46) Radial tear sparing the MFL attachment with displacement https://youtu.be/CsqLEKzVQn4 https://youtu.be/nKQsItyKAtM ✅ Patterns of LM posterior horn tears and posterior root tears ✅ Radiographics. 2023 Jul;43(7):e220208 1. Wrisberg rip tear 2. Complete radial tear at the meniscus posterior horn and root junction, including meniscofemoral ligament attachment 3. Radial tear sparing the meniscofemoral ligament attachment without associated root stump displ.. 2024. 2. 7. (Fig 1-B.45) Radial tear sparing the MFL attachment without displacement https://youtu.be/ub99rc_tK14 https://youtu.be/nKQsItyKAtM 1. Radial tear sparing the MFL attachment without displacement Radial tears that spare the meniscofemoral ligament attachment typically occur near where the meniscofemoral ligaments attach to the meniscus. These intact ligaments help stabilize the lateral meniscus, preventing its extrusion. 2. LM Posterior Root Tear. Association with ACL .. 2024. 2. 7. (Fig 1-B.44) Complete complex tear, including MFL attachment https://youtu.be/1KsXGhdy64c https://youtu.be/nKQsItyKAtM 🚑 Patterns of LM posterior horn tears and posterior root tears 🚑 Radiographics. 2023 Jul;43(7):e220208 1. Wrisberg rip tear 2. Complete radial tear at the meniscus posterior horn and root junction, including meniscofemoral ligament attachment 3. Radial tear sparing the meniscofemoral ligament attachment without associated root stump displ.. 2024. 2. 7. (Fig 1-B.43) Wrisberg rip tear https://youtu.be/438iohjQTQk https://youtube.com/shorts/Kno6P7UGi4E?si=8WqESkAXGd0r0fbQ https://youtu.be/nKQsItyKAtM 📊Essentials of the Wrisberg Rip and Meniscofemoral Ligaments 📊 1. Wrisberg Rip 🌟: Identifies a specific longitudinal tear where the posterior horn of the lateral meniscus meets the meniscofemoral ligament. Look for this if the meniscofemoral ligament extends 14 mm past the PCL — a.. 2024. 2. 7. (Fig 1-B.41) False positive Ramp lesions https://youtu.be/jMWfBrTQpAU https://youtu.be/nKQsItyKAtM 🔴🇰🇷Summary of the key points regarding false positive ramp lesions in meniscal imaging: 1️⃣Edema and Pericapsular Damage: A Skeletal Radiology (2018) study noted that while edema affecting the posterior capsule might indicate pericapsular soft tissue damage, the presence of edema alone is insufficient to diagnose a ramp lesion. Skeletal R.. 2024. 2. 7. (Fig 1-B.40) Type 4B Ramp lesion https://youtu.be/tVuFwC_p_ZE https://youtu.be/nKQsItyKAtM Key points in identifying and assessing a meniscal flounce include: ✅Appearance: It presents as a wavy or kinked pattern along the meniscus's inner edge. ✅Imaging Challenge: On coronal plane imaging, a flounce can make the meniscus's inner margin appear shortened or fuzzy, which might be mistaken for a small radial tear. ✅Clinical Signifi.. 2024. 2. 7. (Fig 1-B.39) Type 4A Ramp lesion https://youtu.be/c7v4dpgbjmE https://youtu.be/nKQsItyKAtM Type 4 Ramp lesion is a complete posterior peripheral tear or complete meniscocapsular junction tear Subtype 4A: This subtype features a complete longitudinal vertical tear of the red-red zone of the meniscus. The tear includes the meniscocapsular and meniscotibial attachments, which remain intact. However, they are connected to a portion.. 2024. 2. 7. (Fig 1-B.38) Type 3 Ramp lesion, Partial inferior or hidden lesion https://youtu.be/QNYpDEnkogw https://youtu.be/nKQsItyKAtM 1. Type 3 Ramp Lesions - 'Hidden Lesions': - Occur in the most inferior portion of the posterior horn. - Associated with meniscotibial ligament instability. - Characterized by a red zone partial-thickness inferior tear, accounting for about 11% of cases. - Not typically visible with the trans-notch approach due to their location and parti.. 2024. 2. 7. (Fig 1-B.37) Type 2 Ramp lesion, Partial superior lesion https://youtu.be/SOJSMJICyxQ https://youtube.com/shorts/oZnueY6FxO8 https://youtu.be/nKQsItyKAtM Type 2 Ramp Lesion: Partial Superior Lesion Type 2 Ramp Lesions are characterized by peripheral partial-thickness tears involving the superior margin of the posterior horn of the medial meniscus. These tears retain intact meniscocapsular attachments to the posterior horn. This type of tear pattern is.. 2024. 2. 7. (Fig 1-B.36) Type 1 Ramp lesion, Meniscocapsular lesion https://youtu.be/kY59q4C2yog https://youtube.com/shorts/Q1vuyQGWr8Q https://youtu.be/nKQsItyKAtM Type 1 ramp lesion is an isolated posterior superior meniscocapsular tear Meniscocapsular tears are located peripherally and involve the synovium, leading to posterior meniscocapsular separation from the posterior horn of the medial meniscus Mobility at probing is very low. False positive Ramp lesion.. 2024. 2. 7. (Fig 1-B.35) Classification of Ramp Injuries (Fig 1-B.35) Guess what? Classification of Ramp Injuries https://youtube.com/shorts/ZHs4E3wbEzA?feature=share https://youtu.be/nKQsItyKAtM Ramp lesions are categorized into five types based on their characteristics. Type 1 is an isolated posterior superior meniscocapsular tear, while type 2 involves a partial tear in the same region. Type 3 represents either a partial posterior inferior tear or .. 2024. 2. 6. (Fig 1-B.34) Type 4 complex oblique or longitudinal tear with complete root detachment https://youtu.be/1fYrj0MIVbw https://youtu.be/nKQsItyKAtM 📚 LaPrade's Classification System 🦵 The LaPrade classification system of meniscal root tears characterizes meniscal root tears based on morphology. The system was originally conceived based on arthroscopy. 1️⃣ Type 1: Partial, Stable Root Tear 2️⃣ Type 2: Complete Radial Tear within 9 mm from the Bony Attachment 3️⃣ Type 3: Bucket Handle .. 2024. 2. 6. (Fig 1-B.33) Type 3 Complete root tear with a bucket-handle tear https://youtu.be/PaejSNswMnw https://youtu.be/nKQsItyKAtM 📚 LaPrade's Classification System 🦵 The LaPrade classification system of meniscal root tears characterizes meniscal root tears based on morphology. The system was originally conceived based on arthroscopy. 1️⃣ Type 1: Partial, Stable Root Tear 2️⃣ Type 2: Complete Radial Tear within 9 mm from the Bony Attachment 3️⃣ Type 3: Bucket Handle .. 2024. 2. 6. (Fig 1-B.32) Type 2 Complete radial tear with meniscal extrusion https://youtu.be/rJKppYoJgYg https://youtu.be/nKQsItyKAtM Arthroscopic Classification of Meniscal Root Tears: Type 2 Sagittal Ghost Sign: This sign is characterized by a hyperintense white signal intensity that leads to the disappearance or abrupt blunting of the normal low-signal-intensity meniscus tissue. It is typically observed on a sagittal image. Axial Radial Defect Sign: The axial radial .. 2024. 2. 6. (Fig 1-B.31) Type 1 Stable partial root tear https://youtu.be/im9FJXRg6Ho https://youtu.be/nKQsItyKAtM MRI Classification of Posterior Medial Meniscal Root Injuries: (AJR 2014; 203:1286–1292) Choi et al. introduced an MRI-based classification for posterior medial meniscal root lesions. This classification encompasses a range of MRI findings related to meniscus posterior root attachment issues, including degeneration, partial tears, and com.. 2024. 2. 6. (Fig 1-B.29) Indirect signs of root tears -2 https://youtu.be/d7WmGVVonms https://youtu.be/nKQsItyKAtM Parameniscal Cyst: Parameniscal cysts are commonly used and well-established secondary or indirect signs of a meniscal tear. They, along with meniscal extrusion and subchondral marrow edema, play a crucial role in increasing the diagnostic confidence of radiologists, particularly in cases with technical limitations or equivocal findings. .. 2024. 2. 6. (Fig 1-B.28) Indirect signs of root tears -1 https://youtu.be/wA7hQBNVxOI https://youtube.com/shorts/2stwfxdZcdI https://youtu.be/nKQsItyKAtM MM Extrusion: MM extrusion refers to the displacement of the midbody segment of the medial meniscus by 3 mm or more beyond the tibial plateau cartilage, as visualized on a coronal image. It's significantly more likely to occur in knees with a posterior root tear, but can also be seen in cases of larg.. 2024. 2. 6. 이전 1 2 3 4 5 다음
