Meniscal cyst
A meniscal cyst is an out pouching of joint fluid located along the peripheral margin of the meniscus, and is frequently associated with horizontal meniscal tears. It can also be due to compression injury to the periphery of the meniscus. An MRI is often warranted to assess if the meniscus is torn in order to guide whether conservative treatment will be sufficient in the form of physical therapy or if surgical intervention is needed.