Fig. 2
From: Arthroscopic internal drainage and cystectomy of popliteal cyst in knee osteoarthritis
a An arthroscopic view through anteromedial portal shows the posteromedial capsular fold in front of popliteal cyst in the left knee osteoarthritis patient. b An arthroscopic view through anteromedial portal shows knee cavity internal drainage of popliteal cyst through resecting posteromedial capsule between the medial gastrocnemius tendon and semimembranosus tendon to produce bidirectional flow of popliteal cyst synovial fluid between knee cavity and popliteal cyst. The medial gastrocnemius tendon can be clearly observed. c An arthroscopic view through posteromedial portal shows popliteal cyst cavity (posteromedial to the medial gastrocnemius tendon)