Podium (General) 02

Outcome of total knee arthroplasty in rare cases of extensive synovial osteo-chondromatosis

Kanagasarathy K. Krishnamurthy, MD
Cosultant Meenakshi Hospital Thanjavur, India

Introduction and Objective:   The purpose of this study is to show the rarity and extensiveness of   situation in which synovial chondromatosis can cause secondary degenerative   osteoarthritis of the knee and to evaluate the results of removal of loose   bodies, synovectomy and total knee arthroplasty.

Materials and Methods:   Ten patients who were diagnosed to have secondary osteoarthritis, due to   extensive synovial osteochondromatosis underwent total knee arthroplasty between 2015 to 2020 at our Institution. The diagnosis was confirmed at the   time of surgery by gross or microscopic pathology. Knee society scores were calculated preoperatively and at the most recent follow-up and used as a   measure of outcome.

Results: All   patients were treated with complete synovectomy, removal of loose bodies and a   posterior stabilised knee implant. The study group included eight men and two   women with a mean age of 63 years at the time of surgery Follow-up after TKA   averaged 3.1years (range, 9 months to 3.5years). Total knee range of motion   (ROM) improved from a preoperative mean of 60°(range,30°-70°) to 110°(range,   90°-120°) at final follow-up. Preoperative knee society pain scores improved   from a mean of 15 (range, 0-25) to mean of 75(range, 64-88) at final   follow-up.

Conclusion: The   important factors to be considered in the postoperative period were (1)   recurrence and (2) range of motion after TKA. None of our patients showed   evidence of recurrence or malignant transformation. Range of motion significantly improved in all patients after TKA. Our series demonstrates that   total knee arthroplasty is a valuable option for these patients, resulting in   significant improvement of pain and function.