BENEFITS OF ENDOSCOPY FOR TRANSPOSITION IN CUBITAL TUNNEL SYNDROME A PROPECTIVE STUDY ABOUT 16 CASES. Pierre Croutzet, MD ; Jean Kany, MD ; Régis Guinand, MD The Union Clinic, Shoulder Center, Toulouse, France Intro : Endoscopic release for cubital tunnel syndrom is demonstrated as en efficient procedure. However, endoscopy finds limits when transposi.on is needed. Goal : This prospec.ve case series aims at demonstra.ng benefits of endoscopy for transposi.on in cubital tunnel syndrome Method : Over a one-­‐year-­‐period, 16 pa.ents were operated for an endoscopic release and transposi.on. Inclusion criteria were : -­‐isolated ulnar compression at the elbow without clinical sensi.ve and motor deficit -­‐indica.on of transposi.on : nerve instability or bone deformity of the elbow (arthri.s, cubitus valgus >15°). We used a 2,5cm incision, a 4mm endoscope, an Eaton aponeurosis flap for anterior stabiliza.on, neither cast nor physiotherapy. Physical examina.on was performed a5er 1 and 3 months. Analysis criteria were: -­‐peropera.ve : incision length, dura.on of surgery -­‐postopera.ve : pain, paresthesias, elbow mo.on, .me off work. Results: Surgical .me went down from 45 to 25 minutes; incision length was between 2 to 3,5cm. All pa.ents had pain a5er 1 month with very liIle daily ac.vity impairment, none pa.ent had pain a5er 3 months. Paresthesias decrease in all cases a5er 1 month and disappeared in 15/16 a5er 3 months. Mo.on of the elbow was full a5er 1 month, .me off work was 3 weeks (0-­‐8). None deficit of the medial cutaneous nerve of forearm was no.ced Conclusion : Endoscopic transposi.on is a reliable and efficient procedure that leads to quick recovery. Endoscopy is reliable either for simple release or transposi.on. In the future, this procedure could easily be used to perform postero-­‐medial portals in elbow-­‐arthroscopy.