Abstract
Background
Arthropathy of Down syndrome (DA) is largely under-recognized, with an average 2-year delay in diagnosis. Most patients present with polyarthritis, and treatment has historically been challenging.
Objectives
Our objective was to investigate the clinical features and treatment of DA in the largest cohort reported to date.
Methods
In a retrospective chart review at two tertiary care hospitals, International Classification of Diseases, ninth revision, clinical modification (ICD-9-CM) codes for Down syndrome (DS) and juvenile idiopathic arthritis (JIA), between 1 January 1995 and 31 December 2015, were identified and charts reviewed.
Results
In total, 43 patients were identified, with an average (± standard deviation [SD]) follow-up period of 6 ± 4.4 years. The average age of symptom onset was 7.4 ± 3.9 years, with a mean delay of 19 ± 17 months from symptom onset to diagnosis. At diagnosis, 77% of patients had morning stiffness and 72% had abnormal laboratory values; there was an average of 15 ± 13 active joints (range 1–56). Treatment approaches varied, and there was a significant decrease in joints with active arthritis (p < 0.001), with 25% and 39% having at least one change in disease-modifying antirheumatic drug (DMARD) and biologic therapy, respectively. DMARD therapy was discontinued in 60% because of side effects, and 39% had inadequate response to first-line biologic therapy.
Conclusions
DA remains under-recognized, with delays in diagnosis and extensive musculoskeletal symptoms at presentation. While DA can improve with current therapy for JIA (corticosteroids, DMARDs, biologics), barriers include medication toxicity, intolerance, and ineffectiveness. Earlier diagnosis through improved screening and more targeted treatment may allow for earlier disease control and better outcomes.

References
de Graaf G, Buckley F, Skotko BG. Estimates of the live births, natural losses, and elective terminations with Down syndrome in the United States. Am J Med Genet Part A. 2015;167A(4):756–67.
de Graaf G, Buckley F, Skotko BG. Estimation of the number of people with Down syndrome in the United States. Genet Med. 2017;19(4):439–47.
Shin M, Siffel C, Correa A. Survival of children with mosaic Down syndrome. Am J Med Genet Part A. 2010;152A(3):800–1.
Yancey CL, Zmijewski C, Athreya BH, Doughty RA. Arthropathy of Down’s syndrome. Arthritis Rheum. 1984;27(8):929–34.
Juj H, Emery H. The arthropathy of Down syndrome: an underdiagnosed and under-recognized condition. J Pediatr. 2009;154(2):234–8.
Olson JC, Bender JC, Levinson JE, Oestreich A, Lovell DJ. Arthropathy of Down syndrome. Pediatrics. 1990;86(6):931–6.
Krumrey-Langkammerer M, Haas J-P. Trisomy 21 and juvenile idiopathic arthritis: relevance of chromosomal aberrations for the diagnostic assessment of arthritis. Aktuelle Rheumatologie. 2016;41(5):390–5.
Foley C, MacDermott E, Killeen O. Clinical and radiological features of down’s arthropathy. Pediatr Rheumatol. 2014;12(Suppl 1):P30.
Peeters M, Poon A. Down syndrome and leukemia: unusual clinical aspects and unexpected methotrexate sensitivity. Eur J Pediatr. 1987;146(4):416–22.
Petty RE, Laxer RM, Lindsley CB, Wedderburn L. Textbook of pediatric rheumatology. 7th ed. Philadelphia, PA: Saunders; 2016. p. 736.
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 Rheumatol. 2004;31(2):390–2.
Brewer EJ Jr, Bass J, Baum J, Cassidy JT, Fink C, Jacobs J, et al. Current proposed revision of JRA Criteria. JRA Criteria Subcommittee of the Diagnostic and Therapeutic Criteria Committee of the American Rheumatism Section of the Arthritis Foundation. Arthritis Rheum. 1977;20(2 Suppl):195–9.
Cassidy JT, Levinson JE, Bass JC, Baum J, Brewer EJ Jr, Fink CW, et al. A study of classification criteria for a diagnosis of juvenile rheumatoid arthritis. Arthritis Rheum. 1986;29(2):274–81.
Ruperto N, Ravelli A, Murray KJ, Lovell DJ, Andersson-Gare B, Feldman BM, et al. Preliminary core sets of measures for disease activity and damage assessment in juvenile systemic lupus erythematosus and juvenile dermatomyositis. Rheumatology. 2003;42(12):1452–9.
Meiorin S, Pistorio A, Ravelli A, Iusan SM, Filocamo G, Trail L, et al. Validation of the Childhood Health Assessment Questionnaire in active juvenile systemic lupus erythematosus. Arthritis Rheum. 2008;59(8):1112–9.
Wallace CA, Giannini EH, Huang B, Itert L, Ruperto N, Childhood Arthritis Rheumatology Research A, et al. American College of Rheumatology provisional criteria for defining clinical inactive disease in select categories of juvenile idiopathic arthritis. Arthritis Care Res (Hoboken). 2011;63(7):929–36.
Malak R, Kotwicka M, Krawczyk-Wasielewska A, Mojs E, Samborski W. Motor skills, cognitive development and balance functions of children with Down syndrome. Ann Agric Environ Med AAEM. 2013;20(4):803–6.
Kim HI, Kim SW, Kim J, Jeon HR, Jung DW. Motor and cognitive developmental profiles in children with Down syndrome. Ann Rehabil Med. 2017;41(1):97–103.
Padmakumar B, Evans Jones LG, Sills JA. Is arthritis more common in children with Down syndrome? Rheumatology. 2002;41(10):1191–3.
Baum RA, Nash PL, Foster JE, Spader M, Ratliff-Schaub K, Coury DL. Primary care of children and adolescents with down syndrome: an update. Curr Probl Pediatr Adolesc Health Care. 2008;38(8):241–61.
Bull MJ, Committee on G. Health supervision for children with Down syndrome. Pediatrics. 2011;128(2):393–406.
Heiligenhaus A, Heinz C, Edelsten C, Kotaniemi K, Minden K. Review for disease of the year: epidemiology of juvenile idiopathic arthritis and its associated uveitis: the probable risk factors. Ocul Immunol Inflamm. 2013;21(3):180–91.
Martin TM, Rosenbaum JT. An update on the genetics of HLA B27-associated acute anterior uveitis. Ocul Immunol Inflamm. 2011;19(2):108–14.
Saurenmann RK, Levin AV, Feldman BM, Rose JB, Laxer RM, Schneider R, et al. Prevalence, risk factors, and outcome of uveitis in juvenile idiopathic arthritis: a long-term followup study. Arthritis Rheum. 2007;56(2):647–57.
Wallace CA, Giannini EH, Spalding SJ, Hashkes PJ, O’Neil KM, Zeft AS, et al. Trial of early aggressive therapy in polyarticular juvenile idiopathic arthritis. Arthritis Rheum. 2012;64(6):2012–21.
Acknowledgements
The authors acknowledge Chelsey Smith of Children’s Mercy Kansas City for coordinator support, Leena Danawala of University of Missouri-Kansas City for help with data collection, and Judy Thomas of Cincinnati Children’s Medical Center for help obtaining medical records.
Author information
Authors and Affiliations
Corresponding author
Ethics declarations
Conflict of interest
Jordan T. Jones, Nasreen Talib, Daniel Lovell, and Mara L. Becker have no conflicts of interest that are directly relevant to the content of this article.
Funding
No sources of funding were used to conduct this study or prepare this manuscript.
Rights and permissions
About this article
Cite this article
Jones, J.T., Talib, N., Lovell, D. et al. Clinical Features and Treatment of Down Syndrome Arthropathy: Experience from Two US Tertiary Hospitals. Pediatr Drugs 21, 33–39 (2019). https://doi.org/10.1007/s40272-018-0322-0
Published:
Issue Date:
DOI: https://doi.org/10.1007/s40272-018-0322-0