Interventional Neuroradiology

The ESN Fellowship Program

Established in 1994, the Endovascular Surgical Neuroradiology (ESN) Fellowship Program was the first ACGME-accredited INR fellowship in the nation, and it is currently one of only seven such programs. The program holds a dual accreditation through the Society of Neurological Surgeons’ Committee on Advanced Subspecialty Training, which is highly endorsed by the Society of Neurointerventional Surgery, AANS/CNS Joint Section on Cerebrovascular Surgery, and the Society of Vascular and Interventional Neurology.

Program Highlights


  • Hands-on training from multidisciplinary faculty mentors with deep experience training fellows
  • 1000+ diagnostic cerebral and spinal angiograms and 400+ neurointerventional procedures per year; a diverse collection of carotid artery disease, arteriovenous fistulae and arteriovenous malformations; intraoperative angiography; transradial access
  • Comprehensive stroke center with highest volume of stroke admissions in the region and the largest dedicated neurological ICU in the nation


  • Multiple ongoing trials for novel endovascular devices
  • Numerous multicenter research projects spanning a wide range of diseases
  • INR faculty who are recognized leaders in research


  • Weekly joint neuroradiology, neurosurgery and neurology cerebrovascular teaching conference
  • Weekly didactic teaching sessions
  • Graduates become leaders in neurointervention (presidents of major societies, developers of major endovascular technologies, leaders of field-changing studies, leaders of INR service lines across the nation)

Prerequisites for ESN Training

Applicants from Radiology Residency

  1. Diagnostic Neuroradiology Fellowship
  2. Completion of 100 or more Diagnostic Cerebral Angiograms
  3. 6 Months of Rotations on Neurosurgery, Neurology and Neurocritical Care

NOTE: We offer Diagnostic Neuroradiology and ESN as a combined two-year fellowship. Prerequisite rotations must be completed prior to the diagnostic neuroradiology year (excluding the diagnostic cerebral angiography requirement).

Applicants from Neurosurgery Residency

  1. Completion of a 7-year neurosurgery residency
  2. Completion of 100 diagnostic cerebral angiograms

Applicants from Neurology Residency

  1. Completion of a 1-year stroke/vascular neurology fellowship or a 2-year neurocritical care fellowship
  2. Completion of 100 diagnostic cerebral angiograms

How to Apply

To apply, candidates are directed to contact Trish Johnson via 314.362.5950. Applicants will need the following:

  • Completed Universal Application
  • Curriculum vitae
  • Personal statement
  • Dean's letter
  • Copy of ECFMG certificate (if applicable)
  • Visa-size photo
  • Copies of medical school diploma and transcript
  • 3 letters of recommendation
  • USMLE scores — if not a permanent US resident, a copy of applicant's visa, passport and ECFMG certificate

Candidates selected for interviews meet with ESN faculty, including the core faculty and several vascular neurosurgery faculty and current ESN fellows. After the interviews, the ESN faculty meet to discuss the applicant and relative rank compared to other applicants. A position may be offered after this meeting, or after other candidates have been interviewed, depending on the strength of the application. 

ESN applicants that are offered positions must complete the following prior to matriculation in the program:

  1. Obtain a permanent Missouri Medical License
  2. Be board exam eligible (board certification is preferable)
  3. Obtain ACLS training before beginning fellowship training

For more information about our program, please email Trish Johnson or or call 314.362.5950.