MSK MRI

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. ..

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..

https://youtu.be/bNgBZdQCOSs https://youtube.com/shorts/a0GgvplMLQ4 https://youtu.be/nKQsItyKAtM Giraffe Neck Sign The "Giraffe Neck Sign" refers to a trapezoidal shape of the meniscal body, characterized by a thin inner margin and a larger outer margin. This sign has been recently identified as an indicator of medial meniscus posterior root tears. "Visualizing MSK Radiology: A Practical Guide t..

https://youtu.be/w113IDroK1s https://youtu.be/nKQsItyKAtM Both primary and secondary MRI findings can aid in the diagnosis of posterior root tears. Among the primary MRI signs of root tears, three commonly used findings are: 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-intensit..

https://youtu.be/eaqz6AnS_sE https://youtube.com/shorts/zwGm1C5oAEI https://youtube.com/shorts/6ygFdDCmIMM https://youtu.be/nKQsItyKAtM MRI Classification of Posterior Medial Meniscal Root Injuries 1. Root Degeneration: Characterized by thickening of the root with intrasubstance hyperintensity that does not reach the articular surface. 2. Root Partial Tear: Involves abnormal signal intensity ext..

https://youtu.be/IpQCx8TqpBc https://youtu.be/nKQsItyKAtM Hemi-bucket-handle tears "A hemi-bucket-handle tear is an undersurface flap tear of the medial meniscus, where meniscal tissue is displaced toward the intercondylar notch. (there is no truncation of the free edge of the medial meniscus; instead, there is an undersurface flap tear with a predominantly horizontal orientation.) Surgeons are ..

https://youtu.be/x4bLWBfxtfs https://youtu.be/nKQsItyKAtM Broken bucket handle meniscal tears This entity refers to a bucket handle tear with an additional rupture of the meniscal fragment. ​​Broken bucket handle tears are often difficult to identify on MRI. However, it is a crucial injury to be aware of and recognize, as the mobility of the ruptured fragments results in significant pain and joi..

https://youtu.be/KI-DwuO7jCY https://youtube.com/shorts/tiexOL6323Q 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 sig..

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..