Johns Hopkins All Children's Hospital

Pediatric Neuro-Oncology Fellowship

Program Information

Neuro-Oncology is a developing pediatric subspecialty that is in constant evolution as innovative diagnostic strategies, therapeutic, and prognostic factors are being identified. There continues to be a considerable need for physicians who have an interest in this scope of clinical practice as the field continues to evolve.

The current landscape of the neuro-oncology program at Johns Hopkins All Children’s Hospital has placed it in a strong position to provide a unique and innovative training experience to develop the next generation of leaders in pediatric neuro-oncology, which is directly aligned with the tripartite mission of our organization. 

This fellowship program overlaps two of the institutes at Johns Hopkins All Children’s Hospital – the Cancer and Blood Disorders Institute and the Institute for Brain Protection Sciences. These two institutes work closely together and share physical space for the physician leaders which promotes collaboration of patient care, research and program development. 

The neuro-oncology care team also includes physician leaders from Neuropathology, Neurosurgery, and the Division of Neuroradiology. Additionally, the high volume of new neuro-oncology patients provides excellent opportunity for teaching and research.

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Program Leadership

Stacie Stapleton, MD

Stacie Stapleton, MD Neuro-Oncology Fellowship Program Director

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.
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Thomas Geller, MD

Thomas Geller, MD Neuro-Oncology Fellowship Associate Program Director

Dr. Geller joined the hospital staff in 2018. He is board certified in child neurology and specializes in neuro-oncology.
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Mara Cvejic, DO

Mara Cvejic, DO Pediatric Neuro-Oncology Fellow

Dr. Mara Cvejic is a child neurologist with a focus in sleep medicine. She has worked with adult and pediatric patients in both academic and private practice settings. She completed her training in Sleep Medicine at Stanford University, followed by a Child Neurology residency at the Mayo Clinic in Florida. Dr. Mara Cvejic is from Glendale, Wisconsin. Her clinical interests include pediatric brain tumors, including the process of early recognition, outreach and treatment maximizing long term survival and improving overall cognitive function. Her clinical interests also include machine learning and artificial intelligence. Her personal interests include finding the best cheese boards around town, good running trails and strong coffee.


The 1-year neuro-oncology fellowship is primarily clinical fellowship whereas the fellow is required to participate in direct patient care daily. Additional expectations include participation with teaching, lectures, didactics, and the completion of one research or quality improvement project.

Rotations throughout the year include:




Radiation Oncology



Palliative care

Pain service

Home hospice







Adult Neuro-Oncology


Fellowship Application Requirements

Neuro-oncology fellowship applicants must have completed an ACGME accredited pediatric hematology/oncology fellowship or a child neurology residency.

NOTE: J1 Visa sponsorship is not available at this time.

To apply, please use our online application form at the link below.

Pediatric Neuro-Oncology Fellowship Application


Letters of reference may be submitted directly to the program from the referee via email to Medical Education Coordinator Ashley Taylor at