Semimembranosus distal tendon avulsion

Last revised by Daniel J Bell on 28 Oct 2019

Semimembranosus distal tendon avulsion is a specific type of hamstring avulsion injury that can occur in the knee

External rotation and abduction of the flexed knee or valgus force applied to the tibia. Associated injuries include anterior cruciate ligament (ACL) rupture, posterior horn medial meniscal tear and posteromedial corner injuries

Very hard to detect on plain film and may be seen on lateral view as a displaced bony fragment.

MRI is the best modality to detect the lesion and additional associated soft tissue injuries. The small bony fragment may be displaced or in situ. Associated anterior cruciate ligament rupture, posterior horn of medial meniscal tear and meniscocapsular separation are usually present.

  • fat in the distal semimembranosus tendon
    • recognized normal variant
    • the tendon attachment to the tibia should remain intact
    • no tendon retraction

ADVERTISEMENT: Supporters see fewer/no ads

Cases and figures

  • Case 1: non displaced semimembranosus tendon avulsion
    Drag here to reorder.
  • Case 1: defect at posteromedial tibia
    Drag here to reorder.
  • Case 2
    Drag here to reorder.
  • Updating… Please wait.

     Unable to process the form. Check for errors and try again.

     Thank you for updating your details.