Popliteal Cyst
History
A patient presents with pain at the back of the knee.
Findings
There is a large posterior popliteal fluid collection. Marked tri-compartmental degenerative change in the medial joint compartment is also seen. These latter changes are in keeping with secondary avascular necrosis. Also present is a large joint effusion with marked synovitis and synovial hypertrophy.
![](https://eydtc7x2iep.exactdn.com/wp-content/uploads/Popliteal-Cyst-1.webp?strip=all&lossy=1&resize=148%2C178&ssl=1)
![](https://eydtc7x2iep.exactdn.com/wp-content/uploads/Popliteal-Cyst-2.webp?strip=all&lossy=1&resize=148%2C178&ssl=1)