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📌 Osteomeniscal Impingement and Impact Edema
- Osteomeniscal impingement, also known as osteomeniscal impact edema (OIE), is a distinct condition characterized by a peripherally displaced flap tear of the medial meniscus with adjacent reactive bone marrow edema.
- Displacement into the inferior medial gutter is more common than superior displacement.
✅Clinical Presentation
- Patients typically complain of medial knee pain, particularly with knee flexion and valgus stress, as a result of impingement of the meniscal fragment against the bone under an intact medial collateral ligament.
✅Dislocated Meniscal Fragments
- A flap rupture or a dislocated meniscal fragment to the coronal recess between the medial femoral condyle and the deep medial collateral ligament (MCL) may be symptomatic and difficult to distinguish clinically from an injury to the deep MCL.
- Due to the anatomy in this area, a dislocated fragment would normally be located deep to the intact meniscotibial ligament.
- However, it may coexist with an avulsed or ruptured meniscotibial ligament.
- Therefore, a patient with a dislocated meniscal fragment should be thoroughly evaluated for the integrity of the deep MCL.
Skeletal Radiology (2020) 49:823–836
Semin Musculoskelet Radiol. 2016 Feb;20(1):12-25
"Visualizing MSK Radiology: A Practical Guide to Radiology Mastery"
© 2022 MSK MRI Jee Eun Lee All Rights Reserved.
No unauthorized reproduction, redistribution, or use for AI training.
#OsteomeniscalImpingement, #ImpactEdema, #OIE, #MeniscalTear, #MedialMeniscus, #KneeInjury, #BoneMarrowEdema, #MCLInjury, #MeniscalFragment
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