Rozalyn Chok

MD

Investigator and Pediatric Hematologist/Oncologist

As a pediatric hematologist, oncologist, and bone marrow transplant physician, my research interest is finding ways to reduce the adverse side effects and long term consequences of treatment for childhood leukemia and blood disorders. This includes identifying patients who are at higher risk for experiencing complications, learning how to prevent and effective manage complications, and developing guidelines to monitor for long term complications of novel treatments including bone marrow transplant, cellular therapies, and immunotherapy.

Academic Affiliations

  • Clinical Assistant Professor, Division of Hematology, Oncology & Bone Marrow Transplant, Department of Pediatrics, Faculty of Medicine, University of British Columbia
  • Research Theme: Childhood Diseases
  • Research Group(s): Childhood Cancer and Blood Research

Contact Information

Location

4480 Oak Street, Vancouver, British Columbia, Canada, V6H 3N1

Systemic Inflammatory Response Post Alemtuzumab and Low-Dose Total Body Irradiation in Pediatric Patients With Sickle Cell Disease: A Case Series

Pediatric Blood and Cancer

Chok, R. and Girgulis, K. and Nickel, R.S. and Guilcher, G.M.T.

DOI: 10.1002/pbc.31448

Infectious Complications During Reinduction in Children with Relapsed Acute Lymphoblastic Leukemia: A Descriptive Analysis

Pediatric Hematology and Oncology

Chok, R. and Li, A.M.

DOI: 10.1080/08880018.2025.2550516

Allogeneic approach unlocks CAR T cell benefits in solid tumors: Cancer therapy

Nature Medicine

Chok, R. and Ramakrishna, S.

DOI: 10.1038/s41591-025-03510-3

Moyamoya vasculopathy in hemoglobin H Constant Spring: Epidemiological coincidence or pathological consequence?

Pediatric Blood & Cancer

Rozalyn Chok and Jad El Maamari and Heather McCartney and Ali Amid

DOI: 10.1002/pbc.30236

06 / 2023

Peripheral Nucleated Red Blood Cells and Mortality in Critically Ill Children

Journal of Pediatric Hematology Oncology

Pedersen, S.J.V. and Chok, R. and McKillop, S. and Rojas-Vasquez, M. and Duff, J.P. and Szkotak, A. and Bruce, A.A.

DOI: 10.1097/MPH.0000000000002294

Pediatric Benign Neutropenia: Assessing Practice Preferences in Canada

Journal of Pediatric Hematology Oncology

Chok, R. and Price, V. and Steele, M. and Corriveau-Bourque, C. and Bruce, A.

DOI: 10.1097/MPH.0000000000002427

The curious case of the bleeding twins: Neonatal bleeding secondary to acetylsalicylic acid prescribed for preeclampsia prevention

Paediatrics and Child Health Canada

Ediger, K. and Chok, R. and Belletrutti, M. and Hicks, M.

DOI: 10.1093/pch/pxaa091

Variations on a theme

CMAJ

Chok, R.

DOI: 10.1503/cmaj.210111

Screening and diagnosis of heparin-induced thrombocytopenia in the pediatric population: A tertiary centre experience

Thrombosis Research

Chok, R. and Turley, E. and Bruce, A.

DOI: 10.1016/j.thromres.2021.08.020

Pre-transplant CAR T-cell therapy is associated with inferior survival and increased non-relapse mortality in pediatric B-ALL

The curative potential of hematopoietic stem cell transplantation (HSCT) is greatest in pediatric patients with relapsed or refractory B-cell acute lymphoblastic leukemia (B-ALL) is greatest when remission is achieved prior to transplant. Chimeric antigen receptor (CAR) T-cell therapy offers a novel path to remission for chemotherapy-refractory patients, most of whom subsequently undergo HSCT. While the toxicities of HSCT and CAR T-cell therapy are increasingly well-described, data on outcomes when both modalities are used sequentially remain limited. This single-center retrospective study aims to compare survival and transplant-related toxicity in pediatric patients with B-ALL who received CAR T therapy prior to HSCT versus those who did not. The hope is that we can identify patients at higher risk of transplant-related complications and intensify supportive care strategies for these patients during the HSCT process.

Honours & Awards

2025 - Abstract Achievement Award, American Society of Hematology

2024–2025 - Advanced Fellow, Stem Cell Transplantation and Cellular Therapies, Stanford University School of Medicine and Lucile Packard Children’s Hospital, Stanford, CA, USA

2024 - Laura Macrae Award, UBC Department of Pediatrics

Our Research

At BC Children’s, we are making discoveries that save lives and transform health care for children in our province and around the world. Our research portfolio includes basic, clinical, population, and public health research.

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