Ten-Year Retrospective Study on Pigmented Villonodular Synovitis of the Knee at the National Orthopaedic Hospital, Igbobi, Lagos

Background: Pigmented villonodular synovitis (PVNS) is a rare, benign proliferative disorder affecting the synovium, commonly involving the knee joint.This study aimed to provide an overview of PVNS, discuss its clinical presentation and diagnostic challenges.Methods: This retrospective study analyzed medical records of patients diagnosed with pigmented villonodular synovitis (PVNS) at the National Orthopaedic Hospital, Igbobi, Lagos, between January 2010 and December 2021.Patients with histopathologically confirmed PVNS and complete medical records were included.Data were collected on demographics and clinical presentation.