Dr Francesco Allegra is Coordinator of the arthroscopic joint surgery unit at the Department of Orthopedics, Un iversità La Sapienza, where he teaches students and trains fellows in orthopedic practice and arthroscopic surgery. He obtained his medical Degree in Medicine and Surgery from the Catholic University of Rome with the highest honors, and subsequently received his degree in Orthopedic and Traumatology from the same academic institute, furtherly specializing in Physiotherapy. After a collaboration with the Main Military Hospital in Rome, he spent 15 years working at “San Camillo-Forlanini” Hospital in Rome, promoting and developing its arthroscopic surgery services. In 1993 he became Director of the orthopedic unit at Guarnieri Multispecialty Clinic in Rome, further developing arthroscopy methods for different joints. From 2004 to 2007 he directed the orthopedic department at Villa Silvana Hospital. The author of several articles on sport traumatology and arthroscopic surgery, Dr Allegra serves on the Board of Directors of several medical scientific societies, including the Italian Sport Traumatology Society (Società Italiana Traumatologia dello Sport – S.I.Tra.S.), Orthopedic and Traumatology Association of Lazio (ALOTO), and Italian Arthroscopy Society (Società Italiana di Artroscopia – S.I.A.), and since 2008 he has also been a honor member of the American Society of Arthroscopy (AANA).Dr Francesco Lijoi obtained the degree of Medicine and Surgery at Bologna University (Italy) and the Graduation in Orthopedic and Traumatologic Science and in Physiotherapy at the Rizzoli Orthopedic Institute, all with maximum votes and honors. He attended many of the most renowned International Orthopedic Centers in Europe and USA: Hospital Petié-Salpétrière Paris; Middelares Hospital /APRA Kliniek, Antwerpen, Belgium; Orthopaedic Research Center Amsterdam University, The Nederlands,; Hospital for Special Surgery, New York; Hospital for JointDesease, New York; Southern California Orthopedic and Sports Medical Center, Los Angeles). Dr. Lijoi is a member of Italian Society Orthopaedic and Traumatology (SIOT); Italian Society of Arthroscopy (SIA); Italian Society of Knee, Arthroscopy, Cartilage, Sports Traumatology (SIGASCOT); European Society of Sport, Knee and Arthroscopy (ESSKA); he has been an International Member of the American Academy of Orthopedic Surgeons (AAOS) for over 10 years. He published several papers and he is the author of several chapters in published volumes, especially on arthroscopic surgery. He organized Courses and Congresses on arthroscopic techniques and has been speaker and chairman in many National and International events. He has been the Director of the Orthopedic and Traumatologic Unit of the Morgagni Hospital in Forli (Italy) for 14 years. Dr. Lijoi is currently working in private clinics.