Presentation
Locking episodes
Patient Data
There is a bucket-handle tear of the lateral meniscus with the posterior horn displaced in the intercondylar notch, while the body is displaced behind the anterior horn creating a double-delta sign, in keeping with the flipped meniscus.
The medial meniscus is intact.
The ACL, PCL, extensor tendons, and collateral ligaments are intact.
The chondral surfaces are preserved.
Mild joint effusion is noted.
No other significant osseous or soft tissue abnormalities were detected.
Case Discussion
Findings are consistent with a bucket-handle tear (flipped meniscus).
In this case, the bucket handle tear involves the body and posterior horn of the lateral meniscus and in the sagittal plane, the following signs can be seen:
flipped meniscus sign, due to displaced meniscal body posterior to the anterior horn
empty meniscus sign in the posterior third, due to a displaced posterior horn into the intercondylar notch
absent bow-tie sign, due to less than two sagittal consecutive slices demonstrating the normal body of the meniscus
Unable to process the form. Check for errors and try again.