Presentation
Knee pain and swelling with recent history of trauma
Patient Data
Torn body and posterior horn of lateral meniscus, causing a significant portion of the meniscus to flip forward and inward into the intercondylar notch. On the sagittal images, there is a 'ghost meniscus sign' posteriorly. Additionally, there is a double delta sign visible anteriorly.
Contusion of the lateral tibial plateau is noted.
A moderate amount of joint effusion is noted.
A fluid signal is seen surrounding the lateral collateral ligament suggesting a sprain.
Case Discussion
A flipped meniscus is a type of bucket handle tear in which a significant part of the meniscus flips and rests next to the anterior horn, resulting in an empty space at the donor site.