(Fig 2-B.14) Type 2 ACL stump entrapment Lesion

https://youtu.be/FBNWiXQyfPI

https://youtu.be/8yHOp_whDZU

✅Stump Entrapment (SE) Lesions in ACL Injuries ✅

Stump entrapment (SE) lesions are critical considerations in the assessment of anterior cruciate ligament (ACL) injuries, presenting in two distinct types, each with unique morphological characteristics.

1️⃣ Type 1 SE Lesions: 

• Characteristics and Formation Type 1 SE lesions typically mimic the appearance of a classic post-operative cyclops lesion characterized by a nodular mass. 
• These lesions are predominantly located at the anterior aspect of the intercondylar notch. 
• The formation of Type 1 SE lesions is believed to evolve from Type 2 SE lesions, as proposed by Huang et al. 
• type 1 SE lesion develops from a type 2 SE lesion, due to chronic impingement of the ACL stump between femur and tibia, resulting in fibrotic changes
• This transition is attributed to the chronic impingement of the ACL stump between the femur and tibia, leading to fibrotic changes.

2️⃣ Type 2 SE Lesions: 

• Description In contrast, Type 2 SE lesions exhibit a distinctive morphology, lacking the mass-like appearance characteristic of Type 1 lesions. 
• Instead, they feature the anterior portion of the torn ACL folded upon itself, resulting in a thin, tongue-like free end that extends anteriorly out of the intercondylar notch.

 

"Visualizing MSK Radiology: A Practical Guide to Radiology Mastery"

© 2022 MSK MRI Jee Eun Lee All Rights Reserved.

#VisualizingMSK #ACLinjuries #KneeMRI #ACLtear #Stumpentrapment #ACLstump 

You may not distribute or commercially exploit the content.

Nor may you transmit it or store it on any other website or other forms of the electronic retrieval system.