I wonder how many of you encountered a discoid meniscus during knee alloplasty? Was it injured, degenerated or connected with greater/lower rate of degeneration of the condyles facing it?
According to MRI-findings the prevalence of discoid meniscus is 3-5% of the knees. I have met similar cases operatde for TKA in my practice, but cannot report the frequency, although one should expect a higher rate in patients candidates for TKA because of the earlier degenerative changes.
The discoid meniscus is common in East Asian (10-13%) than in Western World (3-5%). In China, it’s very common and routinely being operated (arthroscopic partial meniscectomy-saucerization). It is not that uncommon to see discoid meniscus during TKA as incidence is high, but exact frequency is not known. Most of the discoid gets injured as patients get older due to the degenerative changes of both the meniscus and the bone, and even simple activities predispose to discoid meniscus injury.
Discoid lateral meniscus is a common anatomic meniscal developmental dysplasia with a prevalence from 0.4% to 17.0%. This pathology for medial meniscus have a prevalence from 0.06%-0.30%. In addition, there are also some associated other anatomical variants in tibial and femoral components.
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