title: Torsion of localised pigmented villonodular synovitis of the knee.
abstract: Torsion and subsequent ischaemia is a well-recognised cause of symptoms and morbidity in general surgery. We present three cases of solitary pigmented villonodular tumours of the knee which were found to have undergone torsion. We believe these to be the first intra-articular tumours in which torsion has been reported.
mesh_terms: D000293:Adolescent; D000328:Adult; D005260:Female; D006801:Humans; D007719:Knee Joint; D008297:Male; D008875:Middle Aged; D013585:Synovitis / Q000150:complications*; D013586:Synovitis, Pigmented Villonodular / Q000150:complications* / Q000473:pathology / Q000601:surgery; D014102:Torsion Abnormality