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A rare case of extensive diffuse nonpigmented villonodular synovitis as a cause of total knee arthroplasty failure
Hacı Bayram Tosun1, Abuzer Uludağ1, Sancar Serbest2
1Department of Orthopaedics and Traumatology, Faculty of Medicine, Adiyaman University, Adiyaman, Turkey.
Introduction:
Nonpigmented villonodular synovitis (non-PVNS) is a benign proliferative disease involving the synovium. It is a rare condition that is little recognized. Non-PVNS has been reported as a cause of total knee replacement failure.
Presentation Of Case:
We report a case of extensive diffuse non-PVNS in a patient with tibial component loosening after total knee replacement and review the related literature.
Discussion:
It is reported that pigmented villonodular synovitis (PVNS) occurs less frequently than non-PVNS after knee replacement. However, there are many more case reports of PVNS than non-PVNS after knee arthroplasty in the English-language literature.
Conclusion:
Previously, there were no reported cases of extensive diffuse non-PVNS after total knee arthroplasty (TKA). This case study highlights an unusual case of non-PVNS as a cause of TKA failure. We propose that non-PVNS should be considered as a differential diagnosis in patients after TKA who present with recurrent pain and effusion/hemarthrosis of the knee, and that it is one of the causes of implant loosening after TKA.
