A Displaced Double-Layered Meniscus in a Caucasian Patient: A Case Report

Double-layered menisci are a rare anatomical variant, with cases identified predominantly in Asian populations. We present a case of Caucasian woman with a double-layered lateral meniscus, in which the accessory lateral meniscus had displaced into the intercondylar notch causing feelings of instability within the right knee. The accessory lateral meniscus was removed through arthroscopic surgery, and the patient had complete resolution of her symptoms postoperatively.

Double-layered menisci can present similar to bucket-handled meniscus tears if the accessory meniscus displaces into the intercondylar notch. Arthroscopic debridement can be effective at improving clinical symptoms for these patients.