INTRODUCTION​

• A discoid meniscus is an abnormally large meniscus that is discoid or pancake shaped as opposed to c-shaped

• It is often referred to as popping knee syndrome

• A discoid meniscus tear is simply a meniscus tear that happens to occur in a discoid meniscus

• Around 5% of the population has discoid meniscus

• 25% of patients with discoid meniscus have one on their other knee too

CAUSES 

• Discoid meniscus occurs because of abnormal development

• A discoid meniscus tear occurs from a twisting injury, similar in nature to a standard meniscus tear

SIGNS AND SYMPTOMS

• Mechanical symptoms such as catching, locking, giving out may be associated with a discoid meniscus or a discoid meniscus tear

• Pain in the inside or outer portion of the knee corresponds to location of discoid meniscus tear

TREATMENT​​

• Discoid menisci that are not painful are treated with observation

• Treatment of stable discoid meniscus includes arthroscopic surgery consisting of saucerization where the torn meniscus is debrided and trimmed to a stable edge. In addition, the remaining meniscus is shaped into a normal anatomic meniscus.  

• Treatment of unstable discoid meniscus includes arthroscopic surgery consisting of debridement, saucerization, and stabilization/repair of the meniscus to prevent excessive motion and snapping

 PREVENTION​

• Since discoid meniscus is due to abnormal development, there is no prevention