Neurosurgery Clinical Instructors and Fellow
Skull Base Surgery
Dr. Lee is a Clinical Instructor in the Department of Neurosurgery. After receiving her A.B. in Biology at Harvard College and M.S.E. in Biomedical Engineering at Johns Hopkins University, Dr. Lee obtained her MD and PhD in Neuroscience at Stanford University. Dr. Lee completed neurosurgery residency at Massachusetts General Hospital in Boston with a clinical focus on skull base pathology and research on tumor-neuron interactions. In her fellowship at Stanford, Dr. Lee will be working with Dr. Juan Fernandez-Miranda to obtain specialized surgical training in advanced endoscopic endonasal and open skull base techniques, with the ultimate goal of providing comprehensive treatment to patients with a range of brain tumors, skull base pathology and pituitary lesions.
Dr. Limoges is from Utah where she completed her undergraduate studies at the University of Utah. She completed medical school at Western University of Health Sciences in Lebanon, Oregon and continued on to neurosurgical residency training at the University of Vermont Medical Center in Burlington, Vermont. During residency training her research interests have focused on congenital pediatric neurosurgery, resident selection and resident education. As a clinical instructor at Stanford, Dr. Limoges will be focused on pediatric neurosurgery. Outside of the hospital she enjoys spending time with her husband and two children, traveling, and staying active outdoors.
Cerebrovascular and Endovascular Neurosurgery
Dr. Jason Lee Choi grew up in the Bay Area and did his undergraduate degree at San Jose State University in Music with a focus in Choral Conducting. In addition to his music degree, he completed his pre-medical studies and was awarded a research opportunity by the Howard Hughes Medical Institute, where he worked as a research assistant in virology at Harvard Medical School. He subsequently completed his medical degree at Boston University School of Medicine where he was awarded the Wein Student Research Award. Dr. Choi then completed his neurosurgery training at the University of Chicago Medicine (UCM) and an endovascular neurosurgery fellowship at the University Illinois at Chicago (UIC). Dr. Choi continues to have wide clinical and research interests in cerebrovascular disorders, and cranial/spine trauma.
Dr. Choi joined the Stanford Neurosurgery team as a clinical instructor in Cerebrovascular Surgery to work with Dr. Gary Steinberg in the open management of cerebrovascular disorders and cerebral bypasses, to complete his training as a dual-trained cerebrovascular neurosurgeon. Outside of medicine he enjoys traveling with his wife, cooking, and martial arts.
Neurosurgical Neuro-Oncology and Stereotactic Radiosurgery
David Park, MD, PhD, is a neurosurgeon who graduated medical school from the Catholic University of Korea in Seoul, South Korea. He then completed his internship and residency training in the Department of Neurosurgery, Seoul St. Mary’s Hospital. He became a board-certified neurosurgeon in South Korea in 2014 and then completed his 2-year fellowship in the same hospital in the fields of Brain tumor surgery and Skull base surgery. During his residency training, he was selected to attend graduate school while practicing neurosurgery as a trainee. He focused on combination therapy using engineered stem cells along with the conventional treatment, and successfully defended his PhD thesis titled “Combination therapy for gliomas using temozolomide and interferon-beta secreting human bone marrow-derived mesenchymal stem cells.” in 2015.
After completing his fellowship in South Korea, Dr. Park moved to Singapore in 2016. He worked as a clinical fellow (clinical associate) for one year in the National Neuroscience Institute, focusing on Neurosurgical Oncology and Skull base surgery.
In 2017, Dr. Park then joined Dr. Christian Badr’s lab at the Massachusetts General Hospital, Harvard Medical School, as a postdoctoral research fellow to perform translational research on glioblastoma to complement his clinical expertise. His research focused on the role of fatty acids and lipid metabolism in glioblastoma. During this one-year postdoc research fellowship, he could successfully show that certain fatty acids can accelerate tumor growth in mouse orthotopic glioma models and identified a desaturase enzyme as a key in this process.
During this period, in addition to his work in the lab, Dr. Park launched his own start-up business based on his invention. He came up with the idea of a real-time intraoperative diagnostic tool for tumor detection during glioma surgery. The tool is a diagnostic device that uses intrinsic fluorescence spectroscopy on top of fluorescence imaging to improve the detection of residual tumors during glioma surgery in a very practical way. He collaborated with bioengineers at M.I.T. to develop a prototype and received seed funding from the MIT Sandbox Innovation Fund. As an MIT Sandbox program alumnus, he continues to work on this project.
In 2020, Dr. Park joined the North Shore University Hospital, Zucker School of Medicine at Hofstra/Northwell in Long Island, New York, as a Neurosurgical Oncology Fellow (Teaching Associate). During this one-year fellowship, he worked with Dr. Michael Schulder with a focus on brain tumor surgery including laser interstitial thermal therapy (LITT) and stereotactic radiosurgery (SRS). He could perform brain tumor surgeries using the diverse tools, such as, microscope, endoscope, exoscope and fluorescence guidance.
From July 2021 to June 2022, Dr. Park completed a Neurosurgical Oncology and Radiosurgery Fellowship at the Cleveland Clinic in Cleveland. He devoted his efforts to minimally invasive neurosurgical techniques such as LITT and Gamma Knife SRS, as well as awake brain tumor surgery under guidance of Drs. Gene Barnett, Lilyana Angelov, and Ali Mohammadi.
In July 2022, Dr. Park joined the Department of Neurosurgery at Stanford University as a Clinical Instructor. Dr. Park now works with Drs. Steven D. Chang and Antonio Meola in the field of Cyberknife stereotactic radiosurgery and Neurosurgical oncology.
Hammad Ghanchi was born in Pakistan and immigrated to the United States during elementary school. He completed his undergraduate training at the University of Miami, obtaining dual Bachelors of Science degrees in Biochemistry and Mathematics. Afterwards, Dr. Ghanchi obtained a Masters of Sciences at the University of South Florida with a focus on human anatomy and medical sciences. He then went on to medical school at Lake Erie College of Osteopathic Medicine in Bradenton, Florida.
Dr. Ghanchi’s interest in neurosurgery grew from a combination of his love of physics and medicine, and naturally fell in love with repairing the human computer during his medical school surgical rotations. He completed his Neurosurgery residency at Riverside University Health System and joined Stanford University as a Clinical Instructor for a Complex Spine Fellowship in July 2022.
Dr. Ghanchi has developed a special focus on spinal oncology cases. Improving quality of life for patients has always been the driving factor for him. He has worked on several research projects throughout his training and wishes to focus his future practice on helping patients regain mobility and live an active and functional lifestyle.
During his first year of residency, he married his high school sweetheart and together they gave birth to their handsome son during Dr. Ghanchi’s sixth year of residency. During his off time, he enjoys spending time with his family and working on household projects.
Dr. Maldaner is a German neurosurgeon trained in Switzerland. He attended medical school at Charité – University Medicine Berlin. Subsequently Dr. Maldaner pursued his neurosurgical training at University Hospital Zurich, Switzerland. As a resident he developed a strong interest in spine surgery and spine research focusing on digital outcome measures. During his residency he was awarded the Swiss Neurosurgical Society (SGNC) Research Award 2021 for his work on the systematic validation of a smartphone-based 6-Minute Walking-Test as an objective measure of function for spine patients. Dr. Maldaner received his Swiss board-certification for neurosurgery (FMH) and has submitted his habilitation thesis on „Digital Objective Measures of Functional Impairment for Lumbar Degenerative Disc Disease “ to the University of Zurich in February 2022. As a clinical instructor at Stanford, Dr. Maldaner will be focused on Complex Spine Surgery. Outside of the hospital Dr. Maldaner enjoys high-intensity interval training, kitesurfing and spending time with family and friends.
Cerebrovascular and Endovascular Neurosurgery
Arjun Pendharkar was born at Stanford Hospital and grew up in the Bay Area. He graduated from Cal Poly San Luis Obispo with a degree in Microbiology. At Cal Poly, Arjun worked in the lab of Dr. Michael Black where he studied Celiac Disease—cloning a novel strain of prophylactic Lactobacillus bacteria to cleave immunogenic gliadin peptides in the small intestine. Prior to attending medical school at Georgetown University, Arjun spent a year in the Department of Neurosurgery at Stanford in the labs of Dr. Raphael Guzman and Gary Steinberg studying intravascular neural stem cell therapy for stroke—specifically elucidating the difference between intra-arterial and intravenous injection. He subsequently completed his neurosurgery residency at Stanford including an NIH R25 and NREF funded postdoctoral fellowship in Dr. Steinberg’s lab studying motor circuit plasticity and optogenetic stimulation to promote recovery in a mouse model of stroke. Outside of medicine, Arjun enjoys traveling, skiing, and playing golf.
Neurosurgical Oncology and Radiosurgery
Vashisht (Vash) Sekar is a neurosurgeon trained in the United Kingdom. He grew up in Chennai, India and graduated with distinction from Kasturba Medical College in Manipal, India, widely regarded as one of the top medical schools in India. He then underwent a period of clinical and research training in cerebral blood flow haemodynamics and embolisation culminating with a PhD from the prestigious University of Manchester in the United Kingdom in 2014. During this period he also studied for a Diploma in the History of Medicine from the Worshipful Society of Apothecaries in London with an interest in renaissance and European Surgery and was elected as a Member of the Royal College of Surgeons of Edinburgh.
He subsequently underwent clinical Neurosurgical training in Leeds and Belfast culminating with Fellowship of the Royal College of Surgeons of Edinburgh(Neurosurgery).
He has wide clinical and research interests in neurosurgical oncology including gliomas, skull base surgery and spine surgery. He will work on radiosurgical techniques and researching clinical outcomes of complex tumours and novel radiosurgical applications under the supervision of Dr Chang and Dr Meola.
Outside of work, he likes to spend time with his wife and daughters, when time permits paint, watch cricket ,world cinema and read history.
Stereotactic, Functional and Epilepsy Neurosurgery
Matt Willsey grew up in Greenwood, Indiana. He attended MIT, where he received B.S. and M.Eng degrees in Electrical Engineering with a research focus in digital signal processing. He attended medical school at Baylor College of Medicine in Houston. He completed his neurosurgery residency at the University of Michigan in 2022. Matt completed the enfolded CAST-approved fellowship in Stereotactic and Functional Neurosurgery and completed a PhD in Biomedical Engineering during his 2-year protected research time with an additional year long leave-of-absence. His clinical interests include deep brain stimulation, epilepsy, pain, and spine. His dissertation research with Drs. Parag Patil and Cynthia Chestek focuses on restorative neuroengineering, including intraoperative modulation of sensorimotor pathways, the effects of anesthetics on cortical signal flow, and brain-machine interface neuroprosthetics.
Neurosurgical Neuro-Oncology and Stereotactic Radiosurgery
I have completed my neurosurgery residency in Department of Neurosurgery, Marmara University School of Medicine in 2011 After completing my mandatory government hospital service for 1.5 years in rural part of Turkey, I worked as an assistant professor in Department of Neurosurgery, University of Acibadem in Istanbul between 2014-2016. I finished my Complex/Oncological Spine Fellowship, which is a CAST accredited program, at Ohio State University between August 2017 and August 2018. I worked first an observer in Laboratory of Spinal Cord Injury (SCI) and Stem Cell Biology Research in Harvard University, in Boston between January 2017 – May 2017.and than as a post-doc research fellow in Laboratory of Stem Cell Biology and SCI in Harvard University, Boston September 2018 – May 2018. I had continued my further education on oncology at University of Virginia in Charlottesville. First year, between July 2018- June 2019 I did CAST accredited spine fellowship in order to combine my previous spine oncology experience with more complex spine cases. We had performed numerous complex spine and Minimally invasive surgeries. After the first year I started my neurooncology fellowship in which I kept continuing my route with oncology. I did neuro-oncology felloship between July 2020 - June 2021. My responsibilities for the time being; Participating the patient care in the ward, ICU and OR for management of brain and spinal tumors. Among the tumors we treat are glioblastoma, oligodendroglioma, astrocytoma, ependymoma, meningioma, lymphoma, brain metastasis and medulloblastoma. In addition participating the outpatient clinics and also joining in the educational and scholarly activities of the residency program as required and responsibility for teaching and supervising the residents and medical students during the OR cases and outpatient clinic as well. In the second part of this academic year, I'll also participate to the management of brain tumors with Gamma Knife Radio-surgery. In the meantime, I also joined actively in basic science research projects regarding brain tumor research in Abounader Lab in Cancer center that focused on understanding the molecular basis of basis of brain tumor and glioblastoma development and growth using acquired knowledge to identify new therapeutic targets.
In my spare time, I enjoy spending time with my kids and family, cycling, traveling new places, soccer and reading world literature.