Total synovectomy and total knee arthroplasty in old patient with pigmented villonodular synovitis - A case report.

Pigmented villonodular synovitis (PVNS) is a rare and benign lesion of unknown cause. Most cases reported in adult age patients. The diagnosing of PVNS is more difficult in old age patients and might be confused with osteoarthritis. This article reviews detailed history, examination, and investigations of 79 years-old male patient with 5 years history of right knee pain and deformity. The patient was diagnosed with PVNS, and total synovectomy was performed, followed by constrained total knee arthroplasty. The present report aimed to highlight that the total synovectomy with total knee arthroplasty is a viable option with the advantage of favorable outcome in treating patients with PVNS associated with advanced osteoarthritis.