MSK MRI

https://youtu.be/TT-PykByPOQ https://youtu.be/nKQsItyKAtM Absent bow tie sign The absent bow tie sign, where the innermost bow tie is not present, can also be seen in a small or pediatric patient and with a radial tear of the body, macerated meniscus, or prior partial meniscectomy Disproportionally small posterior horn The disproportional posterior horn sign implies the presence of a larger meni..

https://youtu.be/OHke0RUhmi0 https://youtube.com/shorts/mylJNLBdp1Q https://youtu.be/nKQsItyKAtM Double ACL Sign: Occasionally, a bucket-handle tear of the lateral meniscus can present with what's known as the "Double ACL Sign." This sign occurs when the torn fragment is positioned just posterior to the anterior cruciate ligament (ACL). It's important to note that this sign is specific to latera..

https://youtu.be/ozN1U6WaN4s https://youtube.com/shorts/ktPsagkexiE https://youtu.be/nKQsItyKAtM 🧐 Double Posterior Cruciate Ligament (PCL) Sign: Double posterior cruciate ligament (PCL) sign results from meniscal material in the notch, inferior and parallel to the PCL in the same sagittal plane. The intact ACL serves as a barrier, preventing further lateral displacement of the meniscal segment...

https://youtu.be/rwTxz7w45Xs https://youtube.com/shorts/58SqVlZQgAQ https://youtu.be/nKQsItyKAtM 🔍 Understanding Complex Meniscal Tears A combination of radial, horizontal, and longitudinal components. Extends on multiple planes, possibly forming separate flaps. 📸 On MRI: Look for vertical & horizontal patterns, hinting at a fragmented structure. 🚨 'Complex Tear': Indicates extensive distortion ..

https://youtu.be/F0VOgHL4EYg https://youtube.com/shorts/05xM7BZFR_8 https://youtu.be/nKQsItyKAtM 🦵 Recognizing Flap Tears in Meniscus 🦵 When dealing with meniscal flap tears, keep an eye out for a crucial indicator – a change in the slope of the meniscus's superior surface. This change signals a shift in the tear's direction, forming the characteristic flap. 🔍 Changing Slope Sign: Flap tears oft..

https://youtu.be/RvrGR990D0Q https://youtube.com/shorts/ATQAm2YVYSU https://youtu.be/nKQsItyKAtM 🦵 Horizontal Flap Tear vs. Horizontal Tear 🦵 Horizontal Flap Tear In a horizontal flap tear, we observe a meniscal fragment displaced deeper than the Medial Collateral Ligament (MCL). However, in a horizontal cleavage tear, there is no meniscal fragment situated deeper than the MCL. 👁️‍🗨️ Diagnosing ..

https://youtu.be/Xj1xqcs9RSo https://youtube.com/shorts/lLrrwrie-wE https://youtu.be/nKQsItyKAtM 🦵Radial Tear: 🔄 The meniscus-free edge is blunted, suggesting a partial thickness tear. 🔍 The radial tear exhibits a cleft with vertical high signal intensity. 🚫 However, there is no relative deficiency of the inferior surface of the meniscus. 🦵Flap Tear: Characteristic findings in flap tears include..

https://youtu.be/A0HbFl2NEkE https://youtube.com/shorts/KHtzDrMSN64 https://youtu.be/nKQsItyKAtM 🧲 MRI Insights: Displaced Flap Tear into the Popliteal Hiatus 🏥 🌀 Beyond a Simple Tear: This case isn't just a full-thickness radial tear. It's a displaced flap tear, with a trajectory moving posteromedially due to a tear in the body of the lateral meniscus. Originating from the lateral meniscus's bo..

https://youtu.be/vfRwbrm5l3M https://youtube.com/shorts/6Ws0F1EzU2g https://youtube.com/shorts/IodGjmAGzgA https://youtu.be/nKQsItyKAtM Flap Tear vs. Bucket-Handle Tear: Flap tears, unlike bucket-handle tears, do not show complete posterior-to-anterior extension and displacement of the involved meniscal fragment. In this scenario, the flap tear mimics a bucket-handle tear, yet distinct differenc..

https://youtu.be/sMbeDDeLTXs https://youtu.be/nKQsItyKAtM 🔍 Exploring Displaced Meniscal Tears in MRI Understanding meniscal tears is key in knee MRI. Let’s break down the three main types of tears involving displaced meniscal material: 1️⃣ Bucket-Handle Tear with Displacement 2️⃣ Flap Tear with Displacement 3️⃣ Free Fragment Displacement ⚠️ Why It Matters: Identifying any displaced fragments is..