70 year-old female with popliteal pain. Evaluate for Baker's cyst. RIGHT LOWER EXTREMITY:Note is made of a 5.1 x 0.8 x 1.3 cm, anechoic cystic structure along the posterior medial aspect of the right knee, extending from the level of the medial head of the gastrocnemius muscle. There is no internal vascularity.LEFT LOWER EXTREMITY:Note is made of a 5.2 x 0.8 x 2.0 cm, anechoic cystic structure along the posterior medial aspect of the left knee, extending from the expected level of the medial head of the gastrocnemius muscle. There is no internal vascularity.
Bilateral cystic collections along the posteromedial aspects of the knee, which appear most consistent with Baker's cysts. 