Why is discoid meniscus more prone to injury?

Why is discoid meniscus more prone to injury?

A discoid meniscus is more prone to injury than a normal meniscus. The thick, abnormal shape of a discoid meniscus makes it more likely to get stuck in the knee or tear. If the meniscofemoral ligament attachment to the femur is also missing, the risk for injury is even greater.

What percent of people have a discoid meniscus?

The incidence of discoid lateral meniscus is estimated to be 0.4% to 17%, whereas the discoid medial meniscus is extremely rare (0.1% to 0.3%)3–6). It has been reported that about 20% of cases are bilateral5,7,8).

Is discoid lateral meniscus genetic?

It has been suggested that discoid meniscus is a congenital disease, and genetic or familial factors may account for some of the causes [3,4,5].

Are discoid meniscus hereditary?

How long does it take for discoid meniscus to heal?

Recovery from surgical treatment of a discoid meniscus is about 6 weeks to regain full strength and mobility of the joint. Most patients require no immobilization and limited restrictions of weight-bearing.

What is the Wrisberg variant of discoid lateral meniscus?

Wrisberg variant discoid lateral meniscus. In the Wrisberg variant, the morphology of the meniscus may be normal, but the posterior fascicles and meniscotibial ligament are absent and a high signal fluid cleft interposed between the posterior horn and the capsule may simulate a peripheral tear (Figure 6).

What is the prevalence of discoid lateral meniscus?

OBJECTIVE. A discoid lateral meniscus is a common normal variant, occurring in approximately 3-5% of the population. A subgroup of the discoid lateral meniscus known as the Wrisberg variant occurs when there is no posterior attachment of the lateral meniscus.

What is the Wrisberg variant of osteoarthritis?

A Wrisberg variant consists of a discoid lateral meniscus with absent normal fascicles and coronary ligaments that would normally attach the posterior horn of the lateral meniscus to the joint capsule and tibia. This deficiency is unique to the Wrisberg variant.

What is the Wrisberg ring-shaped meniscus?

Monllau et al in 1998 proposed adding a fourth type, the rare ring-shaped meniscus, to the classification. Most patients are asymptomatic, but injury to the meniscus can occur with minor trauma. The Wrisberg variant may present with a snapping knee due to hypermobility.