title: Ossification of the posterior longitudinal ligament in one of a pair of identical twins concordant for ankylosing spondylitis.
abstract: A pair of identical twins suffering from ankylosing spondylitis is reported. One brother developed an earlier-onset disease and showed ossification of the posterior longitudinal ligament and the flavum ligament in his cervical spine.
authors.affiliation: Rheumatic Disease Unit, S. Orsola-Malpighi Hospital, Bologna, Italy.
authors.forename: I
authors.initials: I
authors.lastname: Olivieri
authors.forename: N
authors.initials: N
authors.lastname: Pappone
authors.forename: A
authors.initials: A
authors.lastname: Padula
authors.forename: C
authors.initials: C
authors.lastname: Rengo
authors.forename: G P
authors.initials: GP
authors.lastname: Ruju
authors.forename: A
authors.initials: A
authors.lastname: Pucino
authors.forename: D
authors.initials: D
authors.lastname: Trippi
authors.forename: S
authors.initials: S
authors.lastname: Ferri
authors.forename: G
authors.initials: G
authors.lastname: Pasero
mesh_terms: D000328:Adult; D004200:Diseases in Twins; D006801:Humans; D008297:Male; D009999:Ossification, Heterotopic / Q000150:complications* / Q000000981:diagnostic imaging; D016119:Posterior Cruciate Ligament / Q000000981:diagnostic imaging; D011859:Radiography; D013167:Spondylitis, Ankylosing / Q000150:complications* / Q000000981:diagnostic imaging / Q000235:genetics*; D014430:Twins, Monozygotic