Posteromedial Knee Friction Syndrome

In 2015 a new knee syndrome was discovered – causing pain on the  posteromedial femoral condyle (PMFC) . It was identified by the MRI cases of edema between the PMFC, sartorius and/or gracilis tendons. It is confused with medial cartilage tears.


Skeletal Radiol. 2015 Apr;44(4):557-63. doi: 10.1007/s00256-014-2081-5.
Posteromedial knee friction syndrome: an entity with medial knee pain and edema between the femoral condyle, sartorius and gracilis.
Simeone FJ et al.

Skeletal Radiol. 2018 Sep 11. doi: 10.1007/s00256-018-3060-z. in press
Ultrasound-guided injection for the diagnosis and treatment of posteromedial knee
friction syndrome.
Simeone FJ et al

  • medial knee pains 58%
  • suspicion of medial meniscus 42%
  •  a friction syndrome
  • 68% right knees
  • medial joint line pain 79%
  • positive McMurray 21% (clunking)
  • snapping senstation 11%

inject ion 40 mg triamcinolone reviewed pain in one case and brought another to 2/10

Comment – when is a knee cartilage not an knee cartilage? – I had previously shown that locking and giving way are not reliable indicators of cartilage tear. Now there is evidence of another cause – with tenderness over posteromedial femoral condyle.  I think I have seen this problem before –  and just injected it out without realizing what it was.



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