(Fig 3-A.51) Semimembranosus Bursitis

https://youtu.be/LNGTlEcwN4g

https://youtu.be/GSIg93UH3Oc

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📌Semimembranosus Bursa:

• Horseshoe-shaped synovial bursa around the semimembranosus tendon near posteromedial tibial rim
• Inflamed/distended bursa presents as a synovial-lined space wrapping the tendon
• Demonstrates characteristic reverse 'J' shape or 'inverted-U' shape on imaging

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✅Direct Arm of Semimembranosus Tendon

• Principal attachment of the semimembranosus tendon
• Attaches to posteromedial aspect of tibia, just distal to the joint line
• Forms a C-shaped 5-mm-thick band with the anterior arm

✅Anterior Arm  of Semimembranosus Tendon

• Seen on peripheral medial sagittal images, curving anteriorly
• Appears as a round hypointense structure on coronal images, adjacent to medial tibia, passing under the MCL

 

 

Semin Musculoskelet Radiol. 2016 Feb;20(1):12-25

MRI Web Clinic - June 2018 Medial Supporting Structures of the Knee with Emphasis on the Medial Collateral Ligament

Radiographics. 2015 Jul-Aug;35(4):1123-37

 

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