title: Synovial osteochondromatosis of the ankle: MR findings.
abstract: The authors present a case of primary synovial osteochondromatosis of the ankle, as demonstrated by magnetic resonance (MR). Ankle involvement by osteochondromatosis is unusual. The characteristic MR findings are: target appearance of some loose bodies with a low intensity peripheral rim and a center isointense to the soft tissues on T1-weighted images, which remain unchanged on T2-weighted images. Conversely, other loose bodies were characterized by homogeneous hyperintensity close to the bone marrow on T1-weighted images, with loss of signal on T2-weighted images. The authors believe that these findings are quite pathognomonic of a long-standing synovial osteochondromatosis.
authors.affiliation: Institute of Oncology, University of Messina, Italy.
authors.forename: A
authors.initials: A
authors.lastname: Blandino
authors.forename: L
authors.initials: L
authors.lastname: Salvi
authors.forename: G
authors.initials: G
authors.lastname: Chirico
authors.forename: M
authors.initials: M
authors.lastname: Longo
authors.forename: C
authors.initials: C
authors.lastname: Faranda
authors.forename: P
authors.initials: P
authors.lastname: Romeo
authors.forename: I
authors.initials: I
authors.lastname: Pandolfo
mesh_terms: D000328:Adult; D000843:Ankle Joint / Q000473:pathology*; D015838:Chondromatosis, Synovial / Q000473:pathology*; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male