title: Magnetic resonance imaging in Löfgren's syndrome: demonstration of periarthritis.
abstract: In Löfgren's syndrome, pain and swelling commonly involves the ankle joints. In this prospective case series, the magnetic resonance imaging findings of ankle joint involvement are described. Extensive subcutaneous and soft tissue oedema was commonly seen around the ankles. Bone, cartilage, ligaments and tendons were typically uninvolved. Small amounts of joint and tenosynovial fluid were present without evidence of synovial thickening or synovitis. The fluid is probably reactive to adjacent inflammation in the para-articular soft tissues and probably not representing a primary site of involvement. These findings demonstrate that the arthritis in Löfgren's syndrome stems primarily from periarthritis. This is consistent with prior descriptions using ultrasonography.
authors.affiliation: Department of Rheumatology, Royal North Shore Hospital, St. Leonards, New South Wales, 2065, Australia.
authors.forename: Ananthila
authors.initials: A
authors.lastname: Anandacoomarasamy
authors.forename: Anthony
authors.initials: A
authors.lastname: Peduto
authors.forename: Graydon
authors.initials: G
authors.lastname: Howe
authors.forename: Nicholas
authors.initials: N
authors.lastname: Manolios
authors.forename: David
authors.initials: D
authors.lastname: Spencer
mesh_terms: D000328:Adult; D000843:Ankle Joint / Q000473:pathology*; D005260:Female; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D010489:Periarthritis / Q000473:pathology*; D013577:Syndrome