title: Clinical images: Unilateral knee pain and swelling.
authors.affiliation: Addenbrooke's Hospital, Cambridge University, Cambridge, UK.
authors.forename: Pippa
authors.initials: P
authors.lastname: Watson
authors.forename: Scott
authors.initials: S
authors.lastname: McDonald
authors.forename: Hill
authors.initials: H
authors.lastname: Gaston
mesh_terms: D005260:Female; D006801:Humans; D007717:Knee; D008279:Magnetic Resonance Imaging; D010146:Pain / Q000209:etiology*; D013586:Synovitis, Pigmented Villonodular / Q000150:complications / Q000175:diagnosis*; D055815:Young Adult