Flipped meniscus

Presentation

Knee pain.

Patient Data

Age: 15 years
Gender: Male
MRI

Large appearing anterior horn of the lateral meniscus, secondary to a displaced posterior horn which has flipped into the intercondylar notch, with the body flipped directly posterior to a truncated anterior horn. There is a resultant 'ghost meniscus sign' posteriorly in the expected location of the posterior horn. A double delta sign is seen anteriorly on the sagittal images . 

Mild joint effusion.

Case Discussion

Lateral meniscus bucket handle tear (flipped meniscus).

A flipped meniscus is a sub-type of bucket handle tear where a large portion of meniscus flips to lie adjacent to the anterior horn leaving an empty space at the donor site. It implies either meniscocapsular / meniscopopliteal fascicle detachment or peripheral vertical longitudinal complete tear as was the case here. 

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Case information

rID: 54891
Case created: 4th Aug 2017
Last edited: 7th Aug 2017
Inclusion in quiz mode: Included

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