Dr. Alvin Y. Chan

Gabriel Zada, MD, MS, FAANS, FACS, is Professor of Neurological Surgery, Otolaryngology, and Physiology & Neuroscience at the Keck School of Medicine of USC and an internationally recognized leader in brain, skull base, and pituitary tumor surgery. He serves as Vice Chair of Education and Residency Program Director, Surgical Director of the USC Brain Tumor Center, and Director of the USC Endoscopic Skull Base Surgery Program.Dr. Zada has performed more than 3,000 cranial operations, specializing in minimally invasive and endoscopic approaches for brain, pituitary, and skull base tumors. He completed fellowship training under Dr. Edward Laws at Harvard/Brigham and Women’s Hospital and advanced training under Dr. Paolo Cappabianca in Naples, Italy.An NIH-funded investigator, Dr. Zada has authored more than 400 peer-reviewed publications and 3 surgical textbooks. He is Editor of *Neurosurgical Focus* and President-Elect of the AANS/CNS Joint Section on Tumors. FindExpertMD ranks him the **#1 neurosurgeon in California for pituitary tumors, meningiomas, skull base neoplasms, and neuroendoscopy**. He has treated patients from around the world including Mexico, Guam, Hawaii, Europe. South America, and Canada. Dr. Zada is highly rated in 44 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 Surgery.

Marvin Bergsneider is a Neurosurgery provider practicing medicine in Los Angeles, California. Dr. Bergsneider is highly rated in 39 conditions, according to our data. His clinical expertise encompasses Pituitary Tumor, Hypothalamic Tumor, Brain Tumor, Endoscopic Transnasal Transsphenoidal Surgery, and Balloon Sinuplasty.

Dr. Jefferson W. Chen is a board-certified UCI Health neurosurgeon. who specializes in neurological trauma and critical care, normal pressure hydrocephalus, stroke and brain tumors.He is a leader in such techniques as multimodal brain monitoring for traumatic brain injury and the use of BrainPath® technology to access deep-seated lesions.Chen earned his medical degree and a PhD from Johns Hopkins University School of Medicine in Bethesda, Md., as part of the National Institutes of Health Medical Scientist Training Program. He completed residencies in general and neurological surgery at UC San Diego and a residency in pediatric neurosurgery at Children's Hospital of Los Angeles. He received fellowship training in neurovascular and skull base surgery at the Barrow Neurological Institute of St. Joseph’s Hospital and Medical Center in Phoenix, Ariz.His research interests include the study of the molecular mechanisms and biochemical underpinnings of traumatic brain injury and stroke, and the flow of fluids through the brain. Dr. Chen is highly rated in 20 conditions, according to our data. His clinical expertise encompasses Chronic Subdural Hematoma, Subdural Hematoma, Hydrocephalus, Awake Craniotomy, and Gastrostomy. Dr. Chen is board certified in American Board Of Neurological Surgery - Neurological Surgery. Dr. Chen is currently accepting new patients.