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Our Team

The multidisciplinary precision oncology team at Texas Children’s Cancer Center comprises experts in personalized medicine including oncologists, pathologists, surgeons, and geneticists who work together to identify the best treatment and clinical trial options for each individual patient. Importantly, this team has expertise in the genetics and treatment of each type of childhood cancer and extensive experience with the development and evaluation of innovative new cancer therapies.


Dr. Donald Williams (Will) Parsons is Deputy Director of Texas Children’s Cancer and Hematology Center, Baylor College of Medicine (BCM). He is a board-certified pediatric hematologist-oncologist who also serves as Co-Director of the Brain Tumor Program, Co-Director of the Cancer Genetics and…
Phone: 832-824-4643

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Assistant Director / Neuro-oncology

Dr. Frank Lin is a physician at Texas Children’s Cancer Center. Dr. Lin sees patients in the Urgent Care Bay (UCB) of the outpatient clinic. He is a member of the Brain Tumor Program. Dr. Lin is a graduate of Loyola University of Chicago, Stritch School of Medicine where he received his medical…
Phone: 832-822-4242

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Lab Director

Dr. Angshumoy Roy's clinical interests encompass the application of molecular genetic and genomic technologies in the diagnosis of cancer and in the identification and development of biomarkers that predict chemoresistance. His research interests involve exploring the genomics and epigenomics of…
Phone: 832-824-3710

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Dr. Carl Allen is co-director of the Texas Children’s Cancer Center Histiocytosis and Lymphoma Programs, where he leads a team of over 30 clinicians and scientists dedicated to improving the outcomes of children and adults with histiocytic disorders, lymphoma and lymphoproliferative disorders.…
Phone: 832-824-4312

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Dr. Rachel Rau is a physician for the Leukemia Program at Texas Children’s Cancer Center. Her research findings identify new therapeutic targets that are developed and tested for use in the patient care clinic. Dr. Rau is fully committed to a career as a physician-scientist dedicated to improving…
Phone: 832-822-4242 (Clinic) and 832-822-1528 (Office)

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Board Certifications American Board of Pediatrics American Board of Pediatrics – Hematology/Oncology American Board of Internal Medicine
Phone: 832-824-4163

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Cancer Genetics Counselor

Ms. Sarah Scollon is a board certified genetic counselor and has been practicing in both clinical and research pediatric genetics for over 10 years. She is board certified by the American Board of Genetic Counseling. In 2011, Ms. Scollon came to Texas Children’s Hospital after 5 years of general…
Phone: 832-824-4685

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Nurse Coordinator

Coordinator Support

Nurse Manager