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About Sickkids
About SickKids

Wanda Schoonheyt, BScN, MMI

The Hospital for Sick Children
Director, Clinical Programs
Transplant Centre

Phone: 416-813-8681
Email: wanda.schoonheyt@sickkids.ca
Alternate Contact: Harjeet Kaur
Alternate Email: harjeet.kaur@sickkids.ca

Brief Biography

Wanda Schoonheyt began her career at The Hospital for Sick Children in 1979 as a general duty registered nurse. She held an Assistant Head Nurse position on the Ear, Nose and Throat Unit and joined Clinical and Metabolic Genetics in 1984. Wanda developed a clinical expertise in the area of phenylketonuria (PKU) and participated in a number of clinical research projects over her 15-year tenure with the program. In her last four years with Genetics, she held the position of Program Director for the PKU Program until 2001 when she accepted a contract position in the Department of Paediatrics as Director of Administrative Services. She is currently the Director of Clinical Programs (Transplant Centre, Nephrology & Dialysis and Apheresis Unit, Rheumatology, Endocrinology & Diabetes, Gastroenterology & Clinical Nutrition, Paediatric Medicine, Respiratory Medicine, Infectious Diseases, all affiliated ambulatory programs and The Medical Short Stay Unit) and a Transplant Centre executive.


  • Lee, A. Hanley, W.B., Lehotah, D.C., Austin, V.J., Schoonheyt, W.E. Hypotyrosinemia in phenylketonuria (PKU).  Molecular Genetics and Metabolism.  69: 2000.
  • Smith, M.L., Saltzman, J., Schoonheyt, W.E.  Neuropsychological function in mild hyperphenylalaninemia.  J. of Mental Retardation. 105(2):69-80, 2000.
  • Dennis, M., Lockyer, L., Donnelly, R., Wilkinson, M., Schoonheyt, W.E. Intelligence patterns among children with high-function autism, phenylketonuria, and childhood head injury.  J. of Autism and Dev. Dis. 78:1998.
  • Smith, M.L., Hanley, W.B., Clarke, J.T.R., Klim, P., Schoonheyt, W.E., Austin, V.J., Lehotay, D.C. Randomized controlled trial of tyrosine supplementation on neuropsychological performance in phenylketonuria.  Arch. Dis. Child. 78:1998.  
  • Hanley, W.B., Demshar, H., Borczyk, A., Schoonheyt, W.E., Clarke, J.T.R. Newborn phenylketontuira (PKU) Guthrie (BIA) screening and early hospital discharge.  Early Human Development 47:87-96, 1997.  
  • Hanley, W.B., Clarke, J.T.R., Feigenbaum, A., Schoonheyt, W.E., Austin, V. Vitamin B12 deficiency in adolescents and young adults with PKU.  European J. Pediatr. 1996:155 Suppl 1:145-147.  
  • Schoonheyt, W.E., Clarke, J.T.R., Hanley, W.B., Johnson, J.M., Lehotah, D.C. Feto-maternal plasma phenylalanine concentration gradient from 19 weeks gestation to term.  Clinica Chimica Acta: 224:165-169, 1994.  
  • Hanley, W.B., Feigenbaum, A., Clarke, J.T.R., Schoonheyt, W.E., Austin, V.J. Vitamin B12 deficiency in adolescents and young adults with phenylketonuria.  The Lancet: 342:997, 1993.  
  • Hanley, W.B., Clarke, J.T.R., Schoonheyt, W.E.  Undiagnosed phenylketonuria in adult women: a hidden public health problem.  Canadian Medical Association Journal: 143:513-516, 1990.
  • Hanley, W.B., Clarke, J.T.R., Schoonheyt, W.E. Maternal PKU – a review.  Clinical Biochemistry: 20:149-156, 1987.  
  • Schoonheyt, W.E., Hanley, W.B., Clarke, J.T.R., Austin, V., Howe, D.A. Maternal phenylketonuria (MPKU): a preventable cause of mental retardation and congenital anomalies.  Canadian Family Physician: 32: 2253-2257, 1986.