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📌 Transverse Chondral Flap Lesions in Midzone
- Chondral fissures can lead to cartilage delamination and chondral flap lesions when they extend parallel to the bone surface.
- While often occurring at the tidemark, these lesions can also form in the articular cartilage's mid-zone.
✅ Transverse Orientation Midzone Delamination
- A transversely oriented region of failure is sometimes observed in the midzone of articular cartilage on MRI.
- This phenomenon is often associated with chondral fissures.
- Collagen Fiber Disorganization: The transverse failure may represent delamination between pathologically disorganized collagen fibers.
- Cellular Architecture: Another explanation relates to the transverse nature of cellular components in articular cartilage, which appear in rows.
✅ Case Study
- Chondral delamination typically appears as a thin line of near-fluid signal intensity.
- In midzone lesions, this line is seen in the mid to deep zone of the cartilage, superficial to the tidemark.
- Some cartilage tissue may remain deep to the surface defect and the flap.
References:
- J Knee Surg. 2020 November; 33(11): 1088–1099
- MRI Web Clinic – June 2021 Tissue Delamination
"Visualizing MSK Radiology: A Practical Guide to Radiology Mastery"
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Hashtags: #ChondralFlap, #CartilageDelamination, #MidzoneCartilageInjury, #MRIFindings, #ArticularCartilage, #KneeInjury, #OrthopedicImaging, #SportsMedicine, #CartilagePathology, #JointHealth
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