Dr. Mark D. Calayag

Gabriel Zada, MD, MS, FAANS is Professor of Neurological Surgery at the Keck School of Medicine of the University of Southern California and a nationally recognized leader in brain tumor and skull base surgery. He serves as Surgical Director of the USC Brain Tumor Center, Co-Director of the USC Pituitary Center and Radiosurgery Center, and Vice Chair of Education for the Department of Neurosurgery. He is also Editor-in-Chief of Neurosurgical Focus, an international open-access journal of the Journal of Neurosurgery Publishing Group.Dr. Zada specializes in minimally invasive and endoscopic approaches to complex brain, pituitary, and skull base tumors and has performed more than 3,000 cranial operations during his career. His NIH-funded research program focuses on the genomics and epigenetics of brain and pituitary tumors, advancing precision medicine approaches in neurosurgical oncology.A prolific scholar, Dr. Zada has authored over 350 peer-reviewed publications and several textbooks in neurosurgery. Based on independent academic impact and expertise metrics, FindExpertMD ranks him the #1 neurosurgeon in California for multiple tumor (pituitary, meningioma) and skull base conditions and among the top neurosurgeons globally. Dr. Zada is highly rated in 49 conditions, according to our data. His clinical expertise encompasses Pituitary Tumor, Hypothalamic Tumor, Brain Tumor, Endoscopic Transnasal Transsphenoidal Surgery, and Gamma Knife Radiosurgery. Dr. Zada is board certified in American Board Of Neurological Surgeons.

Terence Sanger is a Pediatric Neurologist practicing medicine in Orange, California. Dr. Sanger is highly rated in 13 conditions, according to our data. His clinical expertise encompasses Drug Induced Dyskinesia, Focal Dystonia, Movement Disorders, Cerebral Palsy, and Deep Brain Stimulation. Dr. Sanger is currently accepting new patients.

Tena Rosser is a Pediatric Neurologist practicing medicine in Los Angeles, California. Dr. Rosser is highly rated in 34 conditions, according to our data. Her clinical expertise encompasses Neurofibromatosis, Neurofibromatosis Type 1 (NF1), Schwannomatosis, and Memory Loss.