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Dr Cecelia  De Gzell

Dr Cecelia De Gzell

BMedSc(Syd), BMed(Newcastle), FRANZCR, PhD


  • Radiation Oncology



Dr Cecelia Gzell is an experienced radiation oncologist who consults and treats patients at Icon Cancer Centre, Wahroonga and Concord. She obtained her Bachelor of Medical Science (BMedSc) at the University of Sydney and Bachelor of Medicine (BMed) at the University of Newcastle. Dr Gzell subsequently undertook specialist radiation oncology training at the Royal Prince Alfred Hospital prior to becoming a fellow of the Royal Australian and New Zealand College of Radiologists (RANZCR) in 2011. She later completed a post-graduate neuro-oncology fellowship at Royal North Shore Hospital with research and publications in the field of high-grade gliomas. This research provided the foundations for her PhD focusing on the use of radiation therapy in optimising outcomes of patients with glioblastoma.

Prior to joining Icon, Dr Gzell worked as a neuro-oncology radiation oncologist primarily at St Vincent's and Macquarie University Hospitals (2014-2022). She has specialist expertise in the use of stereotactic radiosurgery and stereotactic radiation therapy techniques. Her clinical experience covers a broad range of solid tumour malignancies with a special interest in brain cancer, primary and secondary central nervous system (CNS) neoplasms and benign intracranial and base of skull lesions.


Dr Gzell enjoys a mixture of clinical work and maintains a strong interest in clinical research and education. She is a full member of the Society of Neuro-Oncology (SNO, USA) and is actively involved with the Co-operative Trials Group for Neuro-Oncology (COGNO). Dr Gzell is a regular contributor to leading national and international publications and conferences. Her current appointments include treasurer of the Stereotactic Interest Group of Australasia (SIGA), board member of the International Stereotactic Radiosurgical Society (ISRS) and senior lecturer at Macquarie University.


  • Sydney Adventist Hospital