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Diagnostic Value of a Multidisciplinary Clinic for Intellectual Disability

Published online by Cambridge University Press:  23 September 2014

Clara van Karnebeek*
Affiliation:
Division of Biochemical Diseases, TIDE-BC, B.C. Children's Hospital, University of British Columbia, B.C., Canada
Tyler Murphy
Affiliation:
Division of Pediatric Neurology, TIDE-BC, B.C. Children's Hospital, University of British Columbia, B.C., Canada
Wynona Giannasi
Affiliation:
Howe Consulting Group, TIDE-BC, B.C. Children's Hospital, University of British Columbia, B.C., Canada
Marion Thomas
Affiliation:
Department of Medical Genetics, TIDE-BC, B.C. Children's Hospital, University of British Columbia, B.C., Canada
Mary Connolly
Affiliation:
Division of Pediatric Neurology, TIDE-BC, B.C. Children's Hospital, University of British Columbia, B.C., Canada
Sylvia Stockler-Ipsiroglu
Affiliation:
Division of Biochemical Diseases, TIDE-BC, B.C. Children's Hospital, University of British Columbia, B.C., Canada
*
*University of British Columbia, Centre for Molecular Medicine and Therapeutics, TIDE-BC, Division of Biochemical Diseases, Department of Pediatrics, B.C. Children's Hospital, Room K3-201, 4480 Oak Street, Vancouver B.C. V6H 3V4, Canada. Email: cvankarnebeek@cw.bc.ca
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Abstract

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Background:

Identification of the underlying cause of intellectual disability (ID) is important as it improves genetic counselling, management, adaptation; yet its etiologic heterogeneity is challenging and often leads to an expensive work-up.

Methods:

To improve this diagnostic trajectory, the multidisciplinary Complex Diagnostic Clinic (CDC) was established for ID patients with unexplained complex systemic and/or neurologic features that were referred to the CDC and evaluated by three medical specialists followed by multi-disciplinary rounds. Analyses included surveys and interviews, (retrospective) chart review, costs calculations and comparison.

Results:

24 children (9 male) were evaluated during seven clinics held over 16 months. The average patient age was 7 years 11 months (range 9 months-18 years). All the children had previously been seen by 2–10 specialist services. The diagnostic yield of the CDC was higher than expected with confirmed and working diagnoses in 11 (46%) and 9 (38%) children respectively. Cost-savings included fewer trips to hospital and fewer tests via more streamlined evaluations. Positive feedback was received from both families and medical professionals.

Conclusions:

The CDC represents an innovative model of personalized care. Specialist collaboration in the interpretation of relevant clinical, biochemical and genomic data resulted in diagnoses, where none had previously been possible.

Type
Original Article
Copyright
Copyright © The Canadian Journal of Neurological 2014

References

1.Shalock, RL, Borthwith-Duffy, S, Buntinx, WHE, Coulter, DL, Craig, EM. Intellectual disability: definition, classification and systems of supports. 2011 11th ed.Washington D.C.American Association on Intellectual and Developmental Disabilities.Google Scholar
2.Luckasson, R, Reeve, A. Naming, defining, and classifying in mental retardation. Ment Retard. 2001 39(1)4752.Google Scholar
3.Shevell, M. Global developmental delay and mental retardation or intellectual disability: conceptualization, evaluation, and etiology. Ped Clinics North Am. 2008 55(5)107184.Google Scholar
4.Ellison, JW, Rosenfeld, JA, Shaffer, LG. Genetic basis of intellectual disability. Annu Rev Med. 2012 64 44150.Google Scholar
5.Manning, M, Hudgins, L. Professional Practice and Recommendations Committee. Array-based technology and recommendations for utilization in medical genetics practice for detection of chromosomal abnormalities. Genet Med. 2010 12(11)7425.Google Scholar
6.de Ligt, J, Willemsen, MH, van Bon, BW. Diagnostic exome sequencing in persons with severe intellectual disability. N Engl J Med. 2012 367(20)19219.CrossRefGoogle ScholarPubMed
7.van Karnebeek, CD, Scheper, FY, Abeling, NG. Etiology of mental retardation in children referred to a tertiary care center: a prospective study. Am J Ment Retard. 2005 110(4)25367.Google Scholar
8.Makela, NL, Birch, P, Friedman, JM, Marra, CA. Parental perceived value of a diagnosis for intellectual disability (ID): a qualitative comparison of families with and without a diagnosis for their child's ID. Am J Med Genet. 2009 149A(11)239340.Google Scholar
9.van Karnebeek, CD, Stockler, S. Treatable inborn errors of metabolism causing intellectual disability: a systematic literature review. Mol Genet Metab. 2012 105(3)36881.Google Scholar
10.van Karnebeek, CD, Houben, RF, Lafek, M, Giannasi, W, Stockler, S. The treatable intellectual disability APP www.treatable-id.org: a digital tool to enhance diagnosis & care for rare diseases. Orphanet J Rare Dis. 2012 7 47 .Google Scholar
11.Michelson, DJ, Shevell, MI, Sherr, EH, Moeschler, JB, Gropman, AL, Ashwal, S. Evidence report: genetic and metabolic testing on children with global developmental delay: report of the Quality Standards Subcommittee of the American Academy of Neurology and the Practice Committee of the Child Neurology Society. Neurology. 2011 77(17)162935.Google Scholar
12.Battaglia, A, Carey, JC. Diagnostic evaluation of developmental delay/mental retardation: an overview. Am J Med Genet C. 2003 117C(1)314.Google Scholar
13.Traynor, BJ, Alexander, M, Corr, B, Frost, E, Hardiman, O. Effect of a multidisciplinary amyotrophic lateral sclerosis (ALS) clinic on ALS survival: a population based study, 1996–2000. J Neurol Neurosurg Psych. 2003 74(9)125861.Google Scholar
14.Williams, J, Sharp, GB, Griebel, ML. Outcome findings from a multidisciplinary clinic for children with epilepsy. Child Health Care. 1995 24(4)23544.Google Scholar
15.Skotko, BG, Davidson, EJ, Weintraub, GS. Contributions of a specialty clinic for children and adolescents with Down syndrome. Am J Med Genet A. 2013 161A(3)4307.Google Scholar
16.Hanna, MG, Wood, NW. Running a neurogenetic clinic. J Neurol Neurosurg Psychiatry. 2002 73 Suppl 2II24.Google Scholar
17.Engbers, HM, Berger, R, van Hasselt, P. Yield of additional metabolic studies in neurodevelopmental disorders. Ann Neurol. 2008 64(2)21217.Google Scholar
18.Rauch, A, Hoyer, J, Guth, S. Diagnostic yield of various genetic approaches in patients with unexplained developmental delay or mental retardation. Am J Med Genet A. 2006 140(19)206374.Google Scholar
19.Guo, L, Li, BX, Deng, M. Etiological analysis of neurodevelopmental disabilities: single-center eight-year clinical experience in south China. J Biomed Biotechnol. 2011 ID318616 111.Google Scholar
20.Jauhari, P, Boggula, R, Bhave, A. Aetiology of intellectual disability in paediatric outpatients in Northern India. Dev Med Child Neurol. 2011 53(2)16772.Google Scholar
21.Gahl, WA, Markello, TC, Toro, C. The National Institutes of Health Undiagnosed Diseases Program: insights into rare diseases. Genet Med. 2012 14(1)519.Google Scholar
22.Mackenzie, A, Boycott, KM. The future is now for rare genetic diseases. CMAJ. 2012 184(14)1603 .Google Scholar
23.Bamshad, MJ, Shendure, JA, Valle, D. The Centers for Mendelian Genomics: a new large-scale initiative to identify the genes underlying rare Mendelian conditions. Am J Med Genet A. 2012 158A(7)15235.Google Scholar