Abstract
A 56-year-old man noticed varicosis on the back of his left knee several years previously. One month before presenting at our department, he experienced severe pain in the gastrocnemius area with left knee joint swelling. Echovenography detected severe venous regurgitation at the saphenopopliteal junction. Computed tomography (CT) angiographic findings revealed multiple venous areas of bulging in the popliteal venous area. We ligated and divided all the venous branches from the small saphenous vein. Postoperatively, the patient reported muscle pain relief in the gastrocnemius region, but his knee joint incompetence persisted. The patient was given an elastic compression stocking and knee joint supporters, and flexibility of his knee joint gradually returned. In the current case, venous reflux from the saphenopopliteal junction to the small saphenous vein caused strain around the area of the knee joint.