Philip Theodosopoulos, MD


Dr. Philip Theodosopoulos is director of the Skull Base Tumor Program and a professor and vice chairman of neurological surgery at UCSF. Before joining UCSF, Theodosopoulos served as the director of Skull Base Surgery at the University of Cincinnati for 10 years.

Theodosopoulos' primary clinical interests involve the treatment of skull base lesions, particularly acoustic neuromas and malignancies, as well as minimally invasive approaches to the skull base. He served as the co-principal investigator for the largest prospective multi-center trial of the surgical treatment of acoustic neuromas, and currently serves on the Medical Advisory Board of the Acoustic Neuroma Association. Theodosopoulos also has extensive expertise in the endoscopic treatment of pituitary adenomas and chordomas and has been a pioneer in the development of new surgical approaches to the skull base.

Theodosopoulos completed his undergraduate work at MIT and medical school at Stanford University. He completed his neurosurgical training at UCSF and a fellowship in cerebrovascular and skull base surgery at the Brigham and Women's Hospital, Harvard University.

He has been faculty on more than 50 national and international surgical courses and serves on the Congress of Neurological Surgeons Education Committee. Theodosopoulos also has extensive expertise in the field of outcomes research, having completed the UCSF Outcome Research and Clinical Epidemiology full curriculum as a resident and having remained involved in outcomes research at the local and national level.


Brain Tumor Center
400 Parnassus Ave., Eighth Floor
San Francisco, CA 94143
Phone: (415) 353-2966
Fax: (415) 353-2167

Hours: Monday to Friday, 8 a.m. - 5 p.m.

California Center for Pituitary Disorders
400 Parnassus Ave., Eighth Floor
San Francisco, CA 94143
Phone: (866) 559-5543
or (415) 353-7500
Fax: (415) 353-2889

Hours: Monday to Friday
8 a.m. – 5 p.m.

Neurosurgery Clinic
400 Parnassus Ave., Eighth Floor
San Francisco, CA 94143
Phone: (415) 353-7500
Fax: (415) 353-2889

Hours: Monday to Friday
8 a.m. – 4:30 p.m.

Board Certification

Neurological Surgery, American Board of Neurological Surgery

Academic Title


More about Philip Theodosopoulos


Stanford University School of Medicine 1996


UCSF Medical Center, Neurosurgery 2002


Brigham and Women's Hospital , Cerebrovascular and Skull Base Surgery 2003

Selected Research and Publications

  1. Chen WC, Hara J, Magill ST, Wu A, Aghi MK, Theodosopoulos PV, Perry A, McDermott MW, Sneed PK, Raleigh DR, Braunstein SE. Salvage therapy outcomes for atypical meningioma. J Neurooncol. 2018 Feb 26.
  2. Wu A, Garcia MA, Magill ST, Chen W, Vasudevan HN, Perry A, Theodosopoulos PV, McDermott MW, Braunstein SE, Raleigh DR. Presenting symptoms and prognostic factors for symptomatic outcomes following resection of meningioma. World Neurosurg. 2017 Dec 14.
  3. Breshears JD, Osorio JA, Cheung SW, Barani IJ, Theodosopoulos PV. Surgery After Primary Radiation Treatment for Sporadic Vestibular Schwannomas: Case Series. Oper Neurosurg (Hagerstown). 2017 Aug 01; 13(4):441-447.
  4. Paulsson AK, Braunstein S, Phillips J, Theodosopoulos PV, McDermott M, Sneed PK, Ma L. Patient-Specific Fetal Dose Determination for Multi-Target Gamma Knife Radiosurgery: Computational Model and Case Report. Cureus. 2017 Jul 31; 9(7):e1527.
  5. Vasudevan HN, Raleigh DR, Johnson J, Garsa AA, Theodosopoulos PV, Aghi MK, Ames C, McDermott MW, Barani IJ, Braunstein SE. Management of Chordoma and Chondrosarcoma with Fractionated Stereotactic Radiotherapy. Front Surg. 2017; 4:35.
  6. Zygourakis CC, Liu CY, Yoon S, Moriates C, Boscardin C, Dudley RA, Lawton MT, Theodosopoulos P, Berger MS, Gonzales R. Analysis of Cost Variation in Craniotomy for Tumor Using 2 National Databases. Neurosurgery. 2017 Apr 10.
  7. Shikary T, Andaluz N, Meinzen-Derr J, Edwards C, Theodosopoulos P, Zimmer LA. Operative Learning Curve After Transition to Endoscopic Transsphenoidal Pituitary Surgery. World Neurosurg. 2017 Jun; 102:608-612.
  8. Dong P, Pérez-Andújar A, Pinnaduwage D, Braunstein S, Theodosopoulos P, McDermott M, Sneed P, Ma L. Dosimetric characterization of hypofractionated Gamma Knife radiosurgery of large or complex brain tumors versus linear accelerator-based treatments. J Neurosurg. 2016 Dec; 125(Suppl 1):97-103.
  9. Magill ST, Theodosopoulos PV, McDermott MW. Resection of falx and parasagittal meningioma: complication avoidance. J Neurooncol. 2016 Nov; 130(2):253-262.
  10. Chiu J, Pierce M, Braunstein SE, Theodosopoulos PV, McDermott MW, Sneed PK, Ma L. Sharpening peripheral dose gradient via beam number enhancement from patient head tilt for stereotactic brain radiosurgery. Phys Med Biol. 2016 Oct 03; 61(20):N532-N541.
  11. Han SJ, Reis G, Kohanbash G, Shrivastav S, Magill ST, Molinaro AM, McDermott MW, Theodosopoulos PV, Aghi MK, Berger MS, Butowski NA, Barani I, Phillips JJ, Perry A, Okada H. Expression and prognostic impact of immune modulatory molecule PD-L1 in meningioma. J Neurooncol. 2016 Dec; 130(3):543-552.
  12. Zygourakis CC, Valencia V, Boscardin C, Nayak RU, Moriates C, Gonzales R, Theodosopoulos P, Lawton MT. Predictors of Variation in Neurosurgical Supply Costs and Outcomes Across 4904 Surgeries at a Single Institution. World Neurosurg. 2016 Dec; 96:177-183.
  13. Ma L, Braunstein SE, Theodosopoulos PV, McDermott MW, Sneed PK. Inherent functional dependence among cochlear dose surrogates for stereotactic radiosurgery of vestibular schwannomas. Pract Radiat Oncol. 2017 Jan - Feb; 7(1):e1-e7.
  14. Zygourakis CC, Liu C, Theodosopoulos PV, Lawton MT, Dudley A, Gonzales R. 153 Significant Interhospital Variation in Cranial Surgery Costs Using the Nationwide Inpatient Sample Database. Neurosurgery. 2016 Aug; 63 Suppl 1:162.
  15. Monfared A, Corrales CE, Theodosopoulos PV, Blevins NH, Oghalai JS, Selesnick SH, Lee H, Gurgel RK, Hansen MR, Nelson RF, Gantz BJ, Kutz JW, Isaacson B, Roland PS, Amdur R, Jackler RK. Facial Nerve Outcome and Tumor Control Rate as a Function of Degree of Resection in Treatment of Large Acoustic Neuromas: Preliminary Report of the Acoustic Neuroma Subtotal Resection Study (ANSRS). Neurosurgery. 2016 Aug; 79(2):194-203.
  16. Garcia MA, Lazar A, Duriseti S, Raleigh DR, Hess CP, Fogh SE, Barani IJ, Nakamura JL, Larson DA, Theodosopoulos P, McDermott M, Sneed PK, Braunstein S. Discovery of additional brain metastases on the day of stereotactic radiosurgery: risk factors and outcomes. J Neurosurg. 2017 Jun; 126(6):1756-1763.
  17. Raleigh DR, Seymour ZA, Tomlin B, Theodosopoulos PV, Berger MS, Aghi MK, Geneser SE, Krishnamurthy D, Fogh SE, Sneed PK, McDermott MW. Resection and brain brachytherapy with permanent iodine-125 sources for brain metastasis. J Neurosurg. 2017 Jun; 126(6):1749-1755.
  18. Safaee MM, Blevins L, Liverman CS, Theodosopoulos PV. Abscess Formation in a Nonfunctioning Pituitary Adenoma. World Neurosurg. 2016 Jun; 90:703.e15-703.e18.
  19. Birk HS, Han SJ, Rolston JD, Rowland NC, Lau C, Theodosopoulos PV, McDermott MW. Resident-led Implementation of a Standardized Handoff System to Facilitate Transfer of Postoperative Neurosurgical Patients to the ICU. Cureus. 2016 Jan 18; 8(1):e461.
  20. Anaizi AN, DiNapoli VV, Pensak M, Theodosopoulos PV. Small Vestibular Schwannomas: Does Surgery Remain a Viable Treatment Option? J Neurol Surg B Skull Base. 2016 Jun; 77(3):212-8.

Publications are derived from MEDLINE/PubMed and provided by UCSF Profiles, a service of the Clinical & Translational Science Institute (CTSI) at UCSF. Researchers can make corrections and additions to their publications by logging on to UCSF Profiles.