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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: Sarah Ermias
Alternate Phone: 416-813-6511
Alternate Fax: 416-813-5326
Alternate Email: sarah.ermias@sickkids.ca

Brief Biography

Dr. De Souza is the Medical Director of the Consultation-Liaison Psychiatry Service at SickKids, and Project Investigator with the Research Institute.  She is an Assistant Professor in the Department of Psychiatry, University of Toronto (UofT). She is a RCPSC Examination Board member for Child and Adolescent Psychiatry.  She holds a position of Vice President of the Canadian Academy of Child and Adolescent Psychiatry (CACAP) and is a board member of the Canadian Academy of Psychosomatic Medicine (CAPM). She is the founding chair of the Paediatric Consultation-Liaison Psychiatry in Canada network. She is a past President of the Medical Staff Association at SickKids.

At UofT, she earned a Bachelor of Science degree with high distinction, a medical degree with Honours and completed a Psychiatry residency.  She has subspecialty certification in Child and Adolescent Psychiatry.

She has been involved with optimizing service delivery through programmatic changes and protocol development to improve care for children and adolescents with medical and psychiatric conditions, including those with somatization.  She is collaborating on care pathways with colleagues in North America.

She is actively involved in education and has collaborated on courses in communication and clinician well-being. She has presented at local, national and international conferences as well as at family education days.  

She received the CACAP Excellence in Education Award in 2017 and the Association for Academic Psychiatry Junior Faculty Award in 2012.


De Souza C.  Chapter 16. Administrative and Financing models in Pediatric Psychosomatic Medicine: A Global, Healthcare Systems-Focused, and Problem-Based Approach.  Springer textbook.  Ed: A Guerrero, N Skokauskas, and P Lee; 2018

Lazor T, Tigelaar L, Pole JD, De Souza C, Tomlinson D, & Sung L. Instruments to measure anxiety in children, adolescents and young adults with cancer: A systematic review. Supportive Care in Cancer September 2017, 25 (9): 2921–2931.

Gangopadhyay, M, Smith H, Pao M, Silver G, Deepmala D, De Souza C, Garcia G, Giles L, Denton D, Jacobowski NPandharipande P, and C Fuchs. Development of the Vanderbilt Assessment for Delirium in Infants and Children to Standardize Pediatric Delirium Assessment By Psychiatrists. Psychosomatics July-August 2017; 58(4):355–363.

Member of AACAP SSRD Working Group. AACAP Facts for Families – Physical Symptoms of Emotional Distress – Somatic Symptoms and Related Disorders. 2017

Physical Symptoms of Emotional Distress: Somatic Symptoms and Related Disorders

Member of AACAP Delirium Working Group.  AACAP Facts for Families – Delirium in Children and Adolescents. 2016

Delirium in Children and Adolescents

Delirium Resource Downloads

De Souza C. AACAP News Presidential Initiative Column on Integrated Care:  Towards Achieving Integrated Care in Canada. Nov / Dec 2016

De Souza C.  Life: Health & Wellness: Doctors’ Notes: Thinking holistically about kids’ health.  Toronto Star 2016 July 18 

Toronto Star: Doctors’ Notes: Thinking holistically about kids’ health

MPA in the News

Peery HE, Day GS, Dunn S, Fritzler MJ, Pruss H, De Souza C, 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 SouzaA Jehovah’s Witness Adolescent with Pancytopenia.  Canadian Medical Association Journal 2012; 184(9):1055-1059

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.

Stachon A and C De SouzaAnxiety 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.

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.

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

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.

De Souza C and R Stirtzinger.  School Based Interventions for Children with Antisocial Behaviour.  Youth Update:  A publication of the Institute for the study of Antisocial behaviour in Youth.  Fall 2000; 18:2, 4-5.

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.

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.