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Cyst in the posteromedial knee and calf. Cyst neck passes between the semimembranosus and medial head of the gastrocnemius tendons. Caudal extension of the cyst in the medial head of the gastrocnemius muscle belly. The cyst is filled with internal avascular echoes. Size is about 180 (craniocaudal) x 54 (width) x 20 (anteroposterior) mm. Subcutaneous edema in the calf. Suprapatellar moderate effusion.
No deep venous thrombosis (images not uploaded).