• 1
    Petty RE, Southwood TR, Manners P, Baum J, Glass DN, Goldenberg J, et al.International League of Associations for Rheumatology classification of juvenile idiopathic arthritis: second revision, Edmonton, 2001. J Rheumatol2004;31:3902.
  • 2
    Fisher C, Ioannou Y, Hall-Craggs M, Sen D.Enthesitis related arthritis: a new era of understanding. Ann Paediatr Rheum2012;1:816.
  • 3
    Mahendra A, Misra R.Aggarwal A. Th1 and Th17 predominance in the enthesitis-related arthritis form of juvenile idiopathic arthritis. J Rheumatol2009;36:17306.
  • 4
    Faingold R, Saigal G, Azouz EM, Morales A, Albuquerque PA.Imaging of low back pain in children and adolescents. Semin Ultrasound CT MR2004;25:490505.
  • 5
    Bollow M, Biedermann T, Kannenberg J, Paris S, Schauer-Petrowski C, Minden K, et al.Use of dynamic magnetic resonance imaging to detect sacroiliitis in HLA-B27 positive and negative children with juvenile arthritides. J Rheumatol1998;25:55664.
  • 6
    Bollow M, Braun J, Biedermann T, Mutze S, Paris S, Schauer-Petrowskaja C, et al.Use of contrast-enhanced MR imaging to detect sacroiliitis in children. Skeletal Radiol1998;27: 60616.
  • 7
    Pagnini I, Savelli S, Matucci-Cerinic M, Fonda C, Cimaz R, Simonini G.Early predictors of juvenile sacroiliitis in enthesitis-related arthritis. J Rheumatol2010;37:2395401.
  • 8
    Czervionke LF, Fenton DS.Fat-saturated MR imaging in the detection of inflammatory facet arthropathy (facet synovitis) in the lumbar spine. Pain Med2008;9:4006.
  • 9
    Hermann KG, Baraliakos X, van der Heijde DM, Jurik AG, Landewe R, Marzo-Ortega H, et al.Descriptions of spinal MRI lesions and definition of a positive MRI of the spine in axial spondyloarthritis: a consensual approach by the ASAS/OMERACT MRI study group. Ann Rheum Dis2012;71: 127888.
  • 10
    Rudwaleit M, Jurik AG, Hermann KG, Landewe R, van der Heijde D, Baraliakos X, et al.Defining active sacroiliitis on magnetic resonance imaging (MRI) for classification of axial spondyloarthritis: a consensual approach by ASAS/ OMERACT MRI group. Ann Rheum Dis2009;68:15207.
  • 11
    Appel H, Loddenkemper C, Grozdanovic Z, Ebhardt H, Dreimann M, Hempfing A, et al.Correlation of histopathological findings and magnetic resonance imaging in the spine of patients with ankylosing spondylitis. Arthritis Res Ther2006;8:R143.
  • 12
    Simkin PA, Downey DJ, Kilcoyne RF.Apophyseal arthritis limits lumbar motion in patients with ankylosing spondylitis. Arthritis Rheum1988;31:798802.
  • 13
    Russell AS, Jackson F.Computer assisted tomography of the apophyseal changes in patients with ankylosing spondylitis. J Rheumatol1986;13:5815.
  • 14
    Hermann KG, Althoff CE, Schneider U, Zuhlsdorf S, Lembcke A, Hamm B, et al.Spinal changes in patients with spondyloarthritis: comparison of MR imaging and radiographic appearances. Radiographics2005;25:55969.
  • 15
    Fisher C, Ioannou J, Sen D. Enthesitis related arthritis: 2 distinct clinical phenotypes? Pediatr Rheumatol 2011;9 Suppl 1:P151.
  • 16
    Flato B, Hoffmann-Vold AM, Reiff A, Forre O, Lien G, Vinje O.Long-term outcome and prognostic factors in enthesitis-related arthritis: a case–control study. Arthritis Rheum2006;54:357382.
  • 17
    Burgos-Vargas R, Vazquez-Mellado J, Pacheco-Tena C, Hernandez-Garduno A, Goycochea-Robles MV.A 26-week randomized, double blind, placebo controlled exploratory study of sulfasalazine in juvenile onset spondyloarthropathies [letter]. Ann Rheum Dis2002;61:9412.
  • 18
    Tse SM, Burgos-Vargas R, Laxer RM.Anti–tumor necrosis factor α blockade in the treatment of juvenile spondyloarthropathy. Arthritis Rheum2005;52:21038.
  • 19
    Batthish M, Rachlis A, Wong B, Stevens S, Anderson M, Feldman BM, et al.Intra-rater reliability of the Bath Ankylosing Spondylitis Disease Activity Index (BASDAI) and the Bath Ankylosing Spondylitis Functional Index (BASFI) in children with spondyloarthritis. Pediatr Rheumatol2012;10 Suppl 1:A45.