MSK MRI

https://youtu.be/NzeljQPtQtU https://youtu.be/SXRAadVysHc ✅ High-grade partial meniscectomy (>25%) In cases of high-grade partial meniscectomy, where more than 25% of the meniscus is removed, diagnosing tears becomes less accurate. For T2-weighted MRI scans, a high signal intensity specifically indicates synovial fluid within a tear's cleft with over 90% specificity, but this sign lacks sensitiv..

https://youtu.be/ryeg6TwVUbI https://youtu.be/SXRAadVysHc Low-grade partial meniscectomy For a low-grade partial meniscectomy, where less than 25% of the meniscus is removed, the postoperative evaluation uses the same criteria as the preoperative assessment, achieving up to 90% accuracy. To identify a tear in both preoperative and postoperative scenarios, the criteria include: A linear intrasubs..

https://youtu.be/wTcKg69j5DU https://youtu.be/SXRAadVysHc ★ Normal signal intensity after partial meniscectomy ★ 1️⃣ Normal Meniscal Morphology After Partial Meniscectomy Following a partial resection, the meniscal morphology undergoes notable changes. There is a diminution of meniscal tissue, characterized by a smooth, regular appearance. Often, the free edge appears slightly blunted. It's not ..

https://youtu.be/Oxdr6hY3lB4 https://youtu.be/VHbQLFiofuc Accessory Iliotibial Band–Meniscal Ligament (AIML) ✅ Definition: The anatomic variation of the anterolateral fixation of the lateral meniscus to the ITB, which we have termed the “accessory iliotibial band–meniscal ligament” or “AIML.” ✅ Prevalence: An AIML was present in 13.3% of all patients (136/1019). ✅ Clinical Significance: The pres..

https://youtu.be/WTx7BoVFTlc https://youtu.be/VHbQLFiofuc ★ Healed vs. Unhealed Meniscal Tears ★ 📌 Distinguishing Factors Tear location is a significant indicator for differentiating between healed and unhealed tears 1️⃣ Healed Tears Display low-signal-intensity strands bridging the tear on T2-weighted imaging. Characterized by a tear width of less than 2 mm. Visible only on intermediate-weighte..

https://youtu.be/qdUkDkT6gFk https://youtu.be/VHbQLFiofuc ★ MR Grade 2 Signal Intensity ★ 1️⃣ General Description Horizontal, linear intrasubstance signal increases from the meniscus's capsular periphery without reaching an articular surface. Lacks a distinct cleavage plane or tear. Typically asymptomatic in patients. Not a prognostic indicator for advancing to grade 3 signal intensity. ✅ Grade ..

https://youtu.be/SwMALyTRvHg https://youtu.be/VHbQLFiofuc ★ Meniscal Ossicle ★ Meniscal ossicles are indicators of potential meniscal tears, loss of articular cartilage, ACL injuries, or meniscal extrusion. Research using MRI has confirmed that meniscal ossicles, which can form in adults, are closely linked with posterior root tears of the meniscus, meniscus extrusion, and worsening osteoarthrit..

https://youtu.be/4TlrLMIVjm4 https://youtu.be/VHbQLFiofuc ✅ Meniscal Flounce and Its Associations: The most significant factor linked to meniscal flounce is a tear at the posterior horn of the medial meniscus (PHMM), followed by a tear at the meniscocapsular junction. When meniscal flounce is observed on knee MRI, it's essential to perform a thorough evaluation to check for potential coexisting ..

https://youtu.be/k5lJ2yLaoZs https://youtu.be/VHbQLFiofuc ✅ Meniscal Flounce Summary: Meniscal flounce refers to a wave-like appearance of meniscus edges in sagittal MRI images. It occurs in about 0.2% to 0.3% of patients, mainly when the knee is flexed, and the free edge shows redundancy. While discussed in the context of the medial meniscus, it can also affect the lateral meniscus. The wave-li..

https://youtu.be/uSt9VQdK9qA https://youtu.be/VHbQLFiofuc ✅ Meniscal Extrusion Summary: Medial meniscal extrusion is defined as meniscal tissue extending 3 mm or more beyond the tibial plateau edge (excluding osteophytes). For lateral meniscal body extrusion, a threshold of 2 mm is suggested. Medial meniscal extrusion alone should not be the sole diagnostic criterion. ✅ Lateral Meniscal Extrusio..