• Lesion similar to ganglion, but in menisci of knee
• Either at lateral or medial joint margin (AJR Am J Roentgenol 2001;177:409)
• Either confined to meniscus or extends beyond capsule
• Almost always associated with meniscal tears; may be due to trauma
• Cyst caused by simple extrusion of synovial fluid through meniscal tear
• Usually pain and swelling

• 27 year old man with symptomatic posterior cruciate ganglion cyst (Knee Surg Relat Res 2012;24:52)
• 66 year old woman with tumor-like medial meniscal cyst (Clinics (Sao Paulo) 2008;63:411)

Resected cyst

Arthroscopic finding

External aspect of cyst

Cyst resection

• Cyst lined by synovial epithelium with nonspecific inflammation and focal hemorrhage

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