Longitudinal tear of medial meniscus13 [Tear_14] Wrisberg Rip_Longitudinal-Vertical Tears -12 The sagittal images progress from lateral to medial and demonstrate the ligament of Wrisberg, passing posterior to the PCL and continuing into the superior margin of the peripheral meniscal tear segment created by the longitudinal tear of the posterior horn of the lateral meniscus. The torn ACL is seen on the sagittal views Note the contusion bone marrow edema at the posterior lateral tibial pla.. 2021. 10. 11. [Shorts #07] Wrisberg Rip_Longitudinal-Vertical Tears #shorts The meniscofemoral ligaments may mimic a peripheral vertical longitudinal tear Due to variability in the ligament attachment site, this cleft can extend variably far, and as a result the discrimination between a true tear and a 'pseudo-tear' may pose a challenge. Wrisberg rips, also known as zip tears or zipper tears, are longitudinal vertical meniscal tears. when the average attachment site lie.. 2021. 10. 11. [Tear_13] Wrisberg Rip_Longitudinal-Vertical Tears -11 The pseudotear caused by the high signal band located between the MFLs and the posterior horn of the lateral meniscus. Wrisberg rip is the longitudinal tear of the posterior horn of the lateral meniscus. Differentiation of this tear from the normal pseudo-tear is made by lateral extension of the cleft between the meniscus and meniscofemoral ligament by 1.4 cm or more lateral to the lateral margi.. 2021. 10. 10. [Tear_12] Wrisberg Rip_Longitudinal-Vertical Tears -10 Wrisberg rip, also known as zip tear or zipper tear is the longitudinal tear of the posterior horn of the lateral meniscus. Wrisberg rip occurs at the junction of the meniscofemoral ligament and the posterior horn of the lateral meniscus. Axial oblique reformatted image demonstrates the course of the ligament of Humphrey anterior to the PCL (blue arrows) as it joins to the meniscal fragment peri.. 2021. 10. 10. [Tear_11] Wrisberg Rip_Longitudinal-Vertical Tears -09 Posterior oblique drawing demonstrates PCL, LM, meniscofemoral ligaments (Humphry ligament and Wrisberg ligament) The meniscofemoral ligaments originate from the posterior horn of the lateral meniscus and insert onto the lateral aspect of the posterior medial femoral condyle, with the Humphry ligament anterior to the posterior cruciate ligament (PCL) and the Wrisberg ligament posteriorly Wrisber.. 2021. 10. 10. [Tear_10] Longitudinal-Vertical Tears_ ACL tear -08 There is a close association between ACL tears and peripheral longitudinal tears in the posterior horns of both the medial and lateral menisci. Acute ACL injury is associated with more lateral meniscal tears, while chronic ACL deficiency is associated with more medial meniscal tears,many of which require meniscectomy. So early ACL reconstruction is recommended also for the prevention of secondar.. 2021. 10. 10. [Tear_09] Wrisberg type discoid lateral meniscus -07 Wrisberg-variant discoid lateral meniscus can be interpreted as peripheral longitudinal tear or popliteomeniscal fascicles tear. Watanabe classification recognizes three distinct variants of discoid meniscus, complete variant, partial variant, and Wrisberg variant. The Wrisberg-variant discoid lateral meniscus is an unstable type that lacks posterior ligament attachments, having only an attachme.. 2021. 10. 9. [Tear_08] Tear of popliteomeniscal fascicles -06 It is sometimes difficult to identify peripheral longitudinal tears in the posterior horn of the lateral meniscus because of the complex anatomy and posterior attachments of the capsule and popliteomeniscal fascicles. Far peripheral longitudinal tears can be more difficult to detect With an “extra” vertical line or layer in the meniscal periphery, it can be a subtle finding that indicates a tear.. 2021. 10. 9. [Tear_07] Far Peripheral Longitudinal Meniscal Tear -05 On the left image, we can easily see the longitudinal tear, but on the right image it is very difficult to identify peripheral longitudinal tear. Like this, longitudinal tears that occur further peripherally can be more difficult to detect. When the tear extends through the meniscal substance it is readily identified against the contrast afforded by the low signal meniscal tissue. or, Identifica.. 2021. 10. 9. [Tear_06] Far Peripheral Tear Longitudinal Meniscal Tear -04 Here is a full-thickness peripheral longitudinal tear of the posterior horn of lateral meniscus. There is an extra vertical line or layer in the periphery of lateral meniscus, indicative of far peripheral longitudinal tear. The tear is parallel and adjacent to the popliteus tendon. It is sometimes difficult to identify peripheral longitudinal tears in the posterior horn of the lateral meniscus b.. 2021. 10. 9. [Tear_05] Inferior Surface Longitudinal Meniscal Tear -03 Longitudinal tears are diagnosed on MRI by the presence of a vertical line of increased signal intensity contacting the superior, inferior, or both surfaces of the meniscus. The longitudinal tear extends to the inferior meniscal surface and courses parallel to the long axis of the meniscus on corresponding PD FSE axial image. [Tear_04] case demonstrates vertically oriented increased signal inten.. 2021. 10. 9. [Tear_04] Complete Longitudinal Meniscal Tear -02 Longitudinal tears almost always involve the posterior horn in both the medial and lateral menisci. They are diagnosed on MRI by the presence of a vertical line of increased signal intensity contacting the superior, inferior, or both surfaces of the meniscus. MR images showing vertically oriented increased signal intensity contacting both articular surfaces of the body and posterior horn of the .. 2021. 10. 9. [Tear_03] Longitudinal Meniscal Tear -01 Left drawing shows a typical longitudinal tear that divides the meniscus into inner and outer halves, and the right drawing shows the expected appearance of the tear. Longitudinal tear with peripheral vertical orientation through the circumferential collagen fibers. Longitudinal tears run perpendicular to the tibial plateau and parallel to the long axis of the meniscus. Unlike horizontal or radi.. 2021. 10. 9. 이전 1 다음
