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CASE REPORT
Year : 2017  |  Volume : 37  |  Issue : 4  |  Page : 168-171

Radiotherapy inducing total knee prosthetic component loosening for recurrent pigmented villonodular synovitis following joint replacement


1 Department of Orthopedics, Taipei Medical University Hospital, Taipei; Department of Orthopedics, School of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan
2 Department of Pathology, College of Medicine, Taipei Medical University, Taipei, Taiwan

Correspondence Address:
Chian-Her Lee
Department of Orthopedics, School of Medicine, College of Medicine, Taipei Medical University, Taipei Medical University Hospital, No. 252, Wuxing Street, Xinyi, Taipei 11031
Taiwan
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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/jmedsci.jmedsci_45_16

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Pigmented villonodular synovitis (PVNS) following total knee arthroplasty (TKA) is a rare condition. We reported a case of PVNS following TKA; initially, arthroscopic synovectomy was performed; however, recurrence of PVNS happened. We performed second arthroscopic synovectomy and moderate dose radiotherapy (total dose 44 cGy/22 fractions to posterior fossa, 36 cGy/18 fractions to knee) for the patient. Unfortunately, distal femur osteonecrosis with femoral and tibial component loosening happened 2 months after completing the radiotherapy procedure. Revision TKA with Legacy Constrained Condylar Knee was done. Radiotherapy is not recommended for recurrent PVNS after TKA.


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