✅ Knee MRI Mastery405 (Fig 2-B.18) Meyers and McKeever classification system type IV https://youtu.be/uJBTc4Fl7ys https://youtu.be/8yHOp_whDZU ✅Intercondylar tibial eminence fracture. Intercondylar tibial eminence fractures stand out as a prevalent type of knee injury among children, most commonly observed between the ages of 8 and 14. These fractures exhibit a range of presentations, from nondisplaced to displaced and from comminuted to non-comminuted forms. Adults, in particul.. 2024. 2. 23. (Fig 2-B.17) Meyers and McKeever classification system type IV https://youtu.be/ydXMr6N0e98 https://youtu.be/8yHOp_whDZU ✅ Meyers and McKeever system (with modifications by Zaricznyj) Type 1: Minimally/Nondisplaced Fragment Type 2: Anterior Elevation Of The Fragment Type 3: Complete Separation Of The Fragment Type 3a: Involves A Small Portion Of Eminence Type 3b: Involves The Majority Of The Eminence Type 4: Comminuted Avulsion Or Rotation Of The Fracture F.. 2024. 2. 23. (Fig 2-B.16) Meyers and McKeever classification system type II https://youtu.be/y2ZFjGX6lG4 https://youtu.be/8yHOp_whDZU ✅ Meyers and McKeever Classification System for Tibial Spine Fractures Type I Injury: Characterized by a minimally displaced fragment. This type of injury typically responds well to conservative treatment methods. Type II Injury: This subtype features an anterior elevation of the fracture fragment, indicating a more significant displaceme.. 2024. 2. 22. (Fig 2-B.15) ACL Avulsion fracture from the femoral attachment https://youtu.be/UtQiRu-VtT8 https://youtu.be/8yHOp_whDZU ✅ ACL Injuries: Tear and Avulsion Fractures Overview Although most ACL tears involve the midsubstance of the ligament, avulsion of its tibial attachment occurs in a minority of cases and is more common in children than adults Osseous avulsions from the femoral condyle are unusual. It is important to distinguish ligamentous tears from avul.. 2024. 2. 21. (Fig 2-B.14) Type 2 ACL stump entrapment Lesion https://youtu.be/FBNWiXQyfPI https://youtu.be/8yHOp_whDZU ✅Stump Entrapment (SE) Lesions in ACL Injuries ✅ Stump entrapment (SE) lesions are critical considerations in the assessment of anterior cruciate ligament (ACL) injuries, presenting in two distinct types, each with unique morphological characteristics. 1️⃣ Type 1 SE Lesions: Characteristics and Formation Type 1 SE lesions typically mimic .. 2024. 2. 21. (Fig 2-B.13) Type 1 ACL stump entrapment Lesion https://youtu.be/gUkKTZcND08 https://youtu.be/8yHOp_whDZU ✅Understanding ACL Stump Entrapment: Diagnosis and Management ✅ ACL stump entrapment (SE) is a condition where a fragment of the torn anterior cruciate ligament (ACL) gets displaced into the intercondylar notch, potentially causing knee extension limitations or locking. This displacement can trigger inflammation and the accumulation of fi.. 2024. 2. 21. (Fig 2-B.12) Positive PCL angle and sign https://youtu.be/N-tf6Sa_Vdo https://youtu.be/8yHOp_whDZU ✅Secondary signs of ACL injury Buckling of the Patellar Tendon Buckling of the Posterior Cruciate Ligament (PCL) A Posterior PCL Line Uncovered Posterior Horn of the Lateral Meniscus Visibility of the Entire Posterior Cruciate Ligament or Lateral Collateral Ligament in One Coronal Image: Normally, these ligaments are not entirely visible .. 2024. 2. 21. (Fig 2-B.11) Secondary Signs of the Acute ACL Tears, Anterior Tibial Translocation https://youtu.be/17rWbgen564 https://youtu.be/8yHOp_whDZU ✅ Secondary Signs of ACL Injury Secondary signs are highly specific indicators of an Anterior Cruciate Ligament (ACL) injury, though they are less sensitive compared to primary signs. While primary signs are pivotal for assessing the ACL's integrity, secondary signs add limited extra diagnostic value. Here's a brief overview: 1️⃣ Anterior.. 2024. 2. 20. (Fig 2-B.10) Deep notch and Long notch signs https://youtu.be/cFT__qq9RZ8 https://youtu.be/8yHOp_whDZU ★ Osseous Injuries in ACL Tears with Pivot Shift Injury Osseous injuries typically affect the anterior/central aspect of the lateral femoral condyle and the posterior aspect of the lateral tibial plateau. Although less common, the posterior aspect of the medial tibial plateau and medial femoral condyle may also exhibit contusive injuries... 2024. 2. 20. (Fig 2-B.09) Mass-like tissue without normally oriented ACL fibers https://youtu.be/AI4fiajtjMo https://youtu.be/8yHOp_whDZU ✅ Stable vs. Unstable ACL Tears 1️⃣ Unstable ACL Tears: The following features are associated with unstable ACL tears (including unstable partial and complete tears): Nonvisualization of the ACL. Visualization of a single bundle. Masslike appearance of the ACL. Anterior tibial translation. Uncovering of the posterior horn of the lateral m.. 2024. 2. 20. (Fig 2-B.08) Abnormal orientation or bowing of the ACL https://youtu.be/aTPXinHnsFE https://youtu.be/8yHOp_whDZU 1️⃣ MRI Imaging Findings for ACL Tears: Positive Predictive Value: A discontinuous anterior cruciate ligament (ACL) or an abnormal horizontal orientation of the ACL is indicative of a 100% positive predictive value for an ACL tear. 2️⃣ Horizontal orientation of ACL: An angle greater than 15º between the roof of the intercondylar notch and.. 2024. 2. 20. (Fig 2-B.07) Proximal ACL tear https://youtu.be/HAe3KIplkU4 https://youtu.be/8yHOp_whDZU ✅ Normal ACL vs. ACL Tear at Femoral Insertion Normal ACL: Appears as an elliptical, homogeneous low signal on axial MRI images, indicating a firm attachment to the lateral femoral condyle. ACL Tear at Femoral Insertion: Axial MRI: Shows increased signal within the proximal ACL fibers or fluid between the torn ACL and lateral femoral cond.. 2024. 2. 20. (Fig 2-B.06) fluid between torn ACL and lateral femoral condyle sidewall -2_axial https://youtu.be/uZcLajjTEOc https://youtu.be/8yHOp_whDZU ✅ Fluid between torn ACL and lateral femoral condyle sidewall_axial image Diagnosing a proximal ACL tear can sometimes be difficult and may occasionally be missed. The normal ACL has an elliptical homogeneous low signal intensity appearance on axial images through the proximal intercondylar notch. In cases of an ACL tear at the femoral .. 2024. 2. 20. (Fig 2-B.05) fluid between torn ACL and lateral femoral condyle sidewall -1_coronal https://youtu.be/c4fcT321i9Y https://youtu.be/8yHOp_whDZU ✅ Fluid between torn ACL and lateral femoral condyle sidewall_coronal image Diagnosing a proximal ACL tear can sometimes be difficult and may occasionally be missed. In cases of an ACL tear at its femoral attachment, high signal intensity within the ACL and the presence of fluid between the torn ACL and the lateral femoral condyle are ide.. 2024. 2. 20. (Fig 2-B.04) Empty notch sign https://youtu.be/WHDY3iC__jk https://youtu.be/8yHOp_whDZU ✔️Empty notch sign The "Empty Notch Sign" is an indicator of an ACL tear or avulsion at its femoral attachment. This sign is identified by a fluid signal at the usual ACL attachment site within the intercondylar notch on axial and coronal fluid-sensitive MRI scans. It emphasizes the importance of thoroughly inspecting the ACL attachments,.. 2024. 2. 19. (Fig 2-B.02) Risk factors for ACL injuries increased slope of the tibial plateau. https://youtu.be/8yHOp_whDZU Research suggests that a combination of an increased posterior-directed slope of the tibial plateau and a shallow medial tibial plateau depth significantly contributes to the risk of anterior cruciate ligament (ACL) injuries. To accurately measure the slope of the tibial plateau, the procedure involves determining the angle between a line that connects the peak point.. 2024. 2. 17. (Fig 2-B.01) Risk factors for ACL injuries notch width index https://youtu.be/GoxPgCqCQ9w https://youtu.be/8yHOp_whDZU Numerous studies have identified the tibial slope and a narrow intercondylar notch width as significant risk factors for ACL injuries. However, contrasting findings exist, with some research suggesting that notch width does not significantly impact ACL injury risk. The Notch Width Index (NWI) serves as a critical measure in this context, .. 2024. 2. 17. (Fig 2-A.12) Pitfalls, Anterior Meniscofemoral Ligament of the Medial Meniscus, Infrapatellar Plica https://youtu.be/YxbG8JYUN74 https://youtu.be/-pVlqbzsZxg Comparison of Anteromedial Meniscofemoral Ligament and Ligamentum Mucosum 1️⃣ Anteromedial Meniscofemoral Ligament (AMML): Definition: An uncommon accessory ligament that extends from the anterior horn of the medial meniscus, running parallel to the Anterior Cruciate Ligament (ACL), to insert into the medial wall of the lateral femoral co.. 2024. 2. 17. (Fig 2-A.11) Complete tear versus mucoid degeneration of the ACL. https://youtu.be/qejRh9wa2DM https://youtu.be/-pVlqbzsZxg ★ Mucoid degeneration Mucoid degeneration of the anterior cruciate ligament (ACL) presents a diagnostic challenge that could lead to misinterpretation as partial ruptures if not accurately recognized. Key indicators include: Celery Stalk Appearance: This unique pattern is a hallmark of mucoid degeneration Ganglion Cysts: The presence of g.. 2024. 2. 17. (Fig 2-A.10) Mucinous or mucoid degeneration of the ACL https://youtu.be/Etr-glkoGTs https://youtu.be/-pVlqbzsZxg ★ Mucinous or Mucoid Degeneration of the ACL 1️⃣ Characteristics: The ACL exhibits a diffuse increase in signal and thickness, with normally oriented intact fibers displaying regular striations. 2️⃣ Appearance: Noted for its “Celery stalk" appearance, characterized by mucoid degeneration and fusiform enlargement. 3️⃣ Coexistence: Mucinous.. 2024. 2. 16. (Fig 2-A.09) Cruciate or Intercondylar notch cysts, ACL ganglion cyst https://youtu.be/AwUp7jM9lsU https://youtu.be/-pVlqbzsZxg ★ Cruciate or Intercondylar Notch Cysts ★ 1️⃣ Definition: Intercondylar notch or ganglion cysts of the ACL, also known as cruciate cysts, are pathological formations that can arise both on the surface and within the Anterior Cruciate Ligament (ACL) substance. 2️⃣ Location: These cysts are typically found in the middle and proximal portion.. 2024. 2. 16. 이전 1 ··· 11 12 13 14 15 16 17 ··· 20 다음
