Johns Hopkins All Children's Hospital

Meet Our Team

The Neuro-Oncology Program utilizes a multidisciplinary team approach to infants, children, adolescents, and young adults with brain and spinal cord tumors.


Stacie L. Stapleton, M.D.

Dr. Stapleton is the director of pediatric neuro-oncology at Johns Hopkins All Children’s Hospital. Dr. Stapleton joined the hospital in 2007 and is double-board certified by the American Board of Pediatrics in general pediatrics and pediatric hematology/oncology. She has formal training in pediatric neuro-oncology.
Dr. Stapleton is on the Pediatric Palliative Care Team at Johns Hopkins All Children’s and she specializes in symptom control and end of life care. She has been awarded a $247,000 grant for clinical research in pediatric palliative care and nearly $350,000 in grant funds for her work in phase I studies for patients with brain and spinal cord tumors.  Dr. Stapleton’s research experience includes investigator-initiated and multi-center research projects.
Dr. Stapleton is an associate professor of pediatrics at the University of South Florida and an assistant professor in the department of pediatrics at Johns Hopkins University.
Dr. Stapleton completed her medical training at St. Louis University School of Medicine, residency training at Lackland Air Force Base in Texas and fellowship training at Baylor College of Medicine/Texas Children’s Hospital. Dr. Stapleton also served 13 years in the United States Air Force.  Dr. Stapleton is a member of the American Board of Pediatrics, the Children’s Oncology Group, the Society of Neuro-Oncology, American Society of Pediatric Hematology/Oncology, and America Academy of Hospice and Palliative Medicine.

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Jennifer Flanary, R.N., B.S.N., CPHON, CCRP

Jennifer Flanary became the hematology/oncology research coordinator in the Vinny Lecavalier Pediatric Cancer and Blood Disorders Center at Johns Hopkins All Children’s Hospital in 2010. Her primary focus is on neuro-oncology research.

She joined the hospital in 1998 and has served as a registered nurse on the Hematology/Oncology/Bone Marrow Transplant unit and in the Hematology/Oncology/Bone Marrow Transplant Outpatient Clinic, nurse manager of the Hematology/Oncology/Bone Marrow Transplant Outpatient Clinic and Cystic Fibrosis clinical research coordinator. She earned her B.S.N. from the University of South Florida. Jennifer is a Certified Pediatric Hematology Oncology Nurse and a Certified Clinical Research Professional and is a recipient of the Daisy Award.

Claudia  Lukas, PA-C

Claudia Lukas is a certified physician assistant who joined the Johns Hopkins All Children’s Hospital neuro-oncology team in May 2017 and has worked as an advanced practice provider with the hematology-oncology division at Johns Hopkins All Children’s since 2003. She also directs the CanSurvive long-term survivorship program.

She earned her Master of Science in Physician Assistant Studies at Northeastern University in Boston. Claudia is a member of the Florida Academy of Physician Assistants, the American Academy of Physician Assistants and the Children’s Oncology Group. As co-investigator on multiple Children’s Oncology Group, institutional and industry-run clinical trials, she plays an integral role in the conduct of research at John’s Hopkins All Children’s.  

Sonja Steinbrueck, R.N.

Sonja Steinbrueck is the neuro-oncology nurse at Johns Hopkins All Children’s Hospital. She joined the hospital in pediatric hematology/oncology in 1996. She has been working specifically in neuro-oncology since 2007 and is in charge of both the neuro-oncology and the neurocutaneous disorders clinics. She provides direct patient care, case management and participates in research.

Sonja received a bachelors in biology from Florida State University and a bachelors in nursing from the University of South Florida. She is certified in chemotherapy by the Association of Pediatric Hematology/Oncology Nurses (APHON) and is a recipient of the Daisy Award and the Good Catch Award.