Patient position and arthroscopic portals, right shoulder, beach chair position. (A) All patients had general anesthesia with interscalene nerve block and were placed in the beach-chair position with a traction device. (B) The ipsilateral lower leg is prepared simultaneously. (C) Normally 3 arthroscopic portals are needed. (D). The semitendinosus tendon harvest site (arrowhead, the insertion of pes anserinus), right lower leg. Abbreviations: ALP, anterolateral portal; AP, anterior portal; LP, lateral portal; LTT, lower trapezius tendon; PP, posterior portal.