(Fig 3-A.43) O'Donoghue’s Triad Lesion

https://youtu.be/hlnrlmZ1U_Q

https://youtu.be/GSIg93UH3Oc

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출처: https://mskmri.tistory.com/1056 [MSK MRI:티스토리]

📌 Case study: O'Donoghue's Triad

• The O'Donoghue unhappy triad refers to the combined injury of the anterior cruciate ligament (ACL), medial collateral ligament (MCL), and meniscus
• Originally described with medial meniscal injury, but lateral meniscal tears more common when ACL and MCL injuries coexist
• Occurs from contact or non-contact injuries

✅ MCL Injury Findings

• Thickening of MCL
• Increased internal signal intensity
• Surrounding soft tissue edema
• Case shown is Grade 2 MCL injury

✅ Meniscal Tear Findings

• Linear high T2 signal through meniscus from superior to inferior articular surface
• Represents complete longitudinal vertical tear in red-red zone
• Classified as ramp lesion subtype 4A

✅ ACL Injury Findings

• Irregular, cloud-like area of high signal in ACL substance
• Loss of normal striated fiber appearance
• Indicates complete tear

 

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#MCLinjury, #POL, #Posteriorobliqueligament, #kneeMRI, #ACLtear, #MCLinjury, #AMRI, #kneeinstability, #ACLInjuries #MeniscalTears