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About Sickkids
About SickKids

Claire De Souza, B.Sc, MD, FRCPC

The Hospital for Sick Children
Head, Medical Psychiatry – Consultation-Liaison Psychiatry Program

Medical Staff Association

University of Toronto
Assistant Professor

Alternate Contact: Mary Nichol
Alternate Phone: 416-813-6511
Alternate Fax: 416-813-5326
Alternate Email: mary.nichol@sickkids.ca

Brief Biography

Dr. De Souza has been a Staff Psychiatrist at SickKids since 2002.  She is the Medical Director of the Consultation-Liaison Psychiatry Program in the Department of Psychiatry at SickKids. She is a Project Investigator with the SickKids Research Institute and an Assistant Professor at the University of Toronto.

De Souza completed her studies at the University of Toronto (U of T), where she earned a Bachelor of Science degree with High Distinction, graduated from Medicine with Honours, and graduated from the Psychiatry Residency with a special focus on Child and Adolescent Psychiatry. She has subspecialty certification in Child and Adolescent Psychiatry with the Royal College of Physicians & Surgeons of Canada. Through U of T, she completed the Stepping Stones Teacher Training Certificate Program, the Project Planning and Management Course, and the Physician Leadership Course.

De Souza sees children and adolescents with a variety of medical conditions. She has been involved with optimizing service delivery and care through programmatic changes and protocol development with an eye to improving care for children and adolescents with complex co-morbid medical and psychiatric conditions, including those with distressing and impairing physical symptoms.  

Her areas of interest include the psychiatric needs of the medically ill, education, and clinician well-being. De Souza has collaborated on courses in communication, clinician well-being, and working with families. She is actively involved in education, supervising and teaching medical students and psychiatry and paediatric residents. She chairs a national group on Paediatric Consultation-Liaison Psychiatry in Canada, and has presented at national and international conferences and at family education days.

De Souza is President of the SickKids Medical Staff Association (MSA), the group that represents the interests of the medical, dental and scientific staff. In this capacity, she sits on a number of Hospital Executive committees including the Medical Advisory Committee, Senior Management and the Board of Trustees. She served previous terms on the MSA Executive as 1st Vice President, 2nd Vice President and Secretary-Treasurer.


Peery HE, Day GS, Dunn S, Fritzler MJ, Pruss H, De Souza C (COL), Doja A, Mossman K, Resch L, Xia C, Sakic B, Belbeck L, and WG Foster. Anti-NMDA Receptor Encephalitis: The disorder, the diagnosis and the immunobiology.  Autoimmunity Reviews 2012 (11):862-873.

Kitney L, Kanani R and C De Souza.  A Jehovah’s Witness Adolescent with PancytopeniaCanadian Medical Association Journal 2012; 184(9):1055-1059

Stachon A and C De Souza.  Anxiety Disorders and Perceptual Disturbances in Adolescents with 22q11.2 Deletion Syndrome Treated with SSRI: A Case Series.Journal of the Canadian Academy of Child and Adolescent Psychiatry 2011; 20(4): 305–310.

Yeshayahu J, Pacak K, Tallett S, De Souza C, M Palmert. When is a phaeo not a phaeo? Depression in an adolescent leading to a phaeochromocytoma-like biochemical profile. Clinical Endocrinology 2011; 75(4):567-68.

De Souza C and O Abla.  Chapter 14: Psychiatric Issues in Handbook of Supportive Care in Pediatric Oncology.  Massachusetts: Jones and Bartlett Publishers, Ed: O Abla, V Breakey, LL Dupuis, and TH Truong; 2010

Andermann L, De Souza C and J Lofchy.  The Psychiatry Institute for Medical Students: More than a Decade of Success.   Academic Psychiatry Mar 2010; 34(2): 150-153.

Mian I, Gearing R, De Souza C and L Solomon.  Corticosteroid-Related Psychiatric Complications In the Treatment of Hodgkin’s Lymphoma in an Adolescent.  Journal of the Canadian Academy of Child and Adolescent Psychiatry 2007;16(1):27-29.

Stirtzinger R, Campbell L, Green A, De Souza C and I Dawe.  Multimodal School-Based Intervention for At-Risk, Aggressive, Latency-Age Youth.Canadian Journal of School Psychology. 2001; 17:1, 27-46.