RÉSUMÉ
<p><b>OBJECTIVE</b>To investigate diagnosis and therapeutic effects of knee joint synovial chondromatosis with arthroscopic.</p><p><b>METHODS</b>From March 1995 to July 2011, 28 patients with knee joint synovial chondromatosis were treated. Among them, 18 males and 10 females ranging age from 25 to 81 (mean 55.2) years,the course of disease ranged from 0.5 to 15 (mean 5.6) years. Clinical manifestation mainly included pain, swell and functional limitation of knee joint. Knee open surgery (17 cases) and laparoscopic surgery (10 cases) were respectively used. Clinical symptom,image data,pathological manifestation and effects under arthroscopy were observed, Lysholm scoring was used to evaluate effects.</p><p><b>RESULTS</b>All patients were followed up except one lost, the duration ranging from 6 to 24 months. Lysholm score in knee open surgery was increased from (41.89 +/- 6.81) preoperatively to (67.73 +/- 7.62) postoperatively;while in laparoscopic surgery it was increased from (40.78 +/- 7.54) preoperatively to (77.46 +/- 8.43) postoperatively.</p><p><b>CONCLUSION</b>Arthroscopic surgery, which has no risk of rupture of incision, nonunion, earlier to exercise, is a good method to diagnosis and treat knee joint synovial chondromatosis.</p>