Fig. 1From: Arthroscopic internal drainage and cystectomy of popliteal cyst in knee osteoarthritisPreoperative MRI image of the left knee popliteal cyst. a Axial view shows that the popliteal cyst is located between the medial gastrocnemius and semimembranosus, and there is communication between popliteal cyst and knee cavity. b Sagittal view shows that the popliteal cyst is located posteriorly to the medial gastrocnemiusBack to article page