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About Sickkids
About SickKids

Oussama Abla, MD

The Hospital for Sick Children
Staff Haematologist/Oncologist

University of Toronto
Department of Paediatrics

Chair Positions

The Histiocyte Society
Rare Histiocytic Disorders Steering Committee

Phone: 416-813-7879
Fax: 416-813-5327
Email: oussama.abla@sickkids.ca
Alternate Contact: Connie Grillo
Alternate Phone: (416) 813-7654 ext. 205977
Alternate Fax: (416) 813-5327
Alternate Email: connie.grillo@sickkids.ca

Brief Biography

Dr. Oussama Abla joined the faculty of the Department of Paediatrics at The Hospital for Sick Children (SickKids) in 2000. Abla is an Academic Clinician in the Division of Haematology/Oncology and a member of the Division’s Leukemia/Lymphoma and In-Patient Services Sections. Abla is a Professor in the Department of Paediatrics at the University of Toronto. He received his MD degree from the University of Genoa, Italy in 1989. His post-graduate training included a paediatric residency at the Gaslini Children’s Hospital in Genoa and a paediatric haematology/oncology fellowship at SickKids in Toronto.

Abla’s clinical interests include paediatric leukemia/lymphomas with a special interest in Acute promyelocytic leukemia (APL), paediatric primary CNS lymphoma, rare paediatric lymphomas, as well as Langerhan’s cell Histiocytosis (LCH) and rare histiocytosis.

Areas of Specialty

  • Leukemia/Lymphoma
  • Histiocytosis

Clinical Care Activities

  • Oncology in-patient care
  • Childhood leukemia: T-cell ALL, Acute Myeloid Leukemia, Acute Promyelocytic Leukemia
  • Childhood Lymphomas, rare lymphomas
  • Childhood Histiocytic disorders: LCH and rare histiocytic disorders

Academic Background

Haematology/Oncology Fellowship
The Hospital for Sick Children, 1995 to 1997

Assistant Professor of Paediatrics
The Hospital for Sick Children, 2000 to June 2010

Associate Professor of Paediatrics
The Hospital for Sick Children, July 2010 to 2019

Professor of Paediatrics
The Hospital for Sick Children, July 2019 to Present

Research Interests

  • Acute Promyelocytic Leukemia
  • Rare Histiocytic Disorders
  • Langerhans' Cell Histiocytosis
  • Paediatric Primary CNS Lymphoma and Rare Lymphomas
  • Supportive Care in children with cancer
  • Parents' Educational Tools

Future Research Interests

  • Biology of Langerhan’s cell histiocytosis and Rare Histiocytoses
  • Chronic Myeloid Leukemia
  • Virtual Reality in Pediatric Oncology

External Funding

  • Garron Family Cancer Centre
  • National Institute of Health (NIH)
  • St. Baldrick’s Foundation
  • Histiocytosis Association of America and Canada
  • Novopharm & Childhood Cancer Foundation


  • 2019 - Editor-in-Chief of “Non-Hodgkin Lymphoma in Childhood and Adolescence"
  • 2018-2019 - Author of "Acute Promyelocytic Leukemia".  An educational video for patients and parents
  • 2018 - Editor-in-Chief of “Acute Promyelocytic Leukemia – A Clinical Guide”
  • 2017 – Editor-in-Chief of “Histiocytic Disorders”
  • 2014 – Primary Investigator “International Rare Histiocytic Disorders Registry” Histiocytic Associations of America and Canada grants
  • 2009 – Editor-in-Chief of “The Hospital for Sick Children Handbook of Supportive Care in Pediatric Oncology”
  • 2008 – Author of “All About ALL”: An educational DVD for parents of children with newly diagnosed ALL


View Dr. Abla's publications on PubMed.