• 09/1977- 06/1983

Erasmus Hellenic-German Primary School, Marousi, Athens, Greece

  • 09/1983- 06/1989

Varvakeios Secondary School, Psychiko, Athens, Greece

  • 09/ 1990- 09/ 1996

Semmelweis University Medical School, English Program, Budapest, Hungary


  • General Medical Council- UK (2000), Specialist Register – Neurosurgery (April 2011)
  • Active, unrestricted licenses in CO, SC, NC, VA, MN, OH, AZ, PA, ND, MO, FL, IMLCC


  • Board Certified Neurological Surgeon, 05/2021
    The American Board of Neurological Surgery
  • The American Board of Neurological Surgery Primary Examination Score
    – 2009: 535 (63rd percentile)
    – 2010: 673 (94th percentile)
    – 2011: 751 (100th percentile)
  • Board Certified Neurosurgeon, 12/2009
    The Hellenic Board of Neurosurgery
  • ECFMG Certificate, Valid Indefinitely [ID Number: 0-521-401-0]
  • MD Degree, 09/1996
    Summa Cum Laude Valedictorian Graduate (GPA: 4.91 / 5.00)
    Semmelweis University Medical School, Budapest, Hungary
  • ABSITE Exam – The American Board of Surgery (2008): 76th Percentile
  • ATLS Certificate – The American College of Surgeons (2001, 2007)
  • PHTLS Certificate – The American College of Surgeons/ NAEMT (2002)
  • FCCS Certificate– The Society for Critical Care Medicine (2003)
  • ACLS Certificate- The American Heart Association (2003, 2007)
  • PALS Certificate- The American Heart Association/ The American Academy of Pediatrics (2004)
  • BLS Certificate- UK (2016)


  • Congress of Neurological Surgeons, Regular Member (2021)
  • American Association of Neurological Surgeons, Fellow Member (2021)
  • American Association of Neurological Surgeons, Section on Tumors, (2018)
  • American Association of Neurological Surgeons, Section on Spine (2014)
  • Neurocritical Care Society (2003)


  • 1991    1st prize, Final Competition in Biophysics, Department of Biophysics
  • 1992    1st prize, Final Competition in Anatomy, Department of Anatomy
  • 1992    1st prize, Final Competition in Physiology, Department of Physiology
  • 1995    1st prize, Annual Congress of the Association of University Research Students

Semmelweis University Medical School, Budapest, Hungary



“Convection-Enhanced Delivery of Recombinant Immunotoxin 8H9-PE38 for the Treatment of Pediatric Infiltrative Brainstem Tumors”

PI: Dr. Mark Souweidane, Dept. of Neurological Surgery

Weill Medical College of Cornell University, New York, NY, USA


 “Ionic and molecular basis of neuronal hyperexcitation during epileptic seizures “

(Experimental model: Rat Hippocampal Slice Electrophysiology.

Extra- and Intracellular Potential Measurements via Pt Electrodes)


  • 1992 – 1996

Research Medical Student

Laboratory of Neuromorphology

Semmelweis University Medical School, Budapest, Hungary

  • 1992 – 1995

Teaching Assistant

Gross and microscopic anatomy, neuroanatomy and neuroembryology

Department of Anatomy 

Semmelweis University Medical School, Budapest, Hungary


  • 07/2021 – to date

Attending Neurosurgeon, Banner Neurosurgery Clinic

North Colorado Medical Centre, Greeley, CO

  • 08/2019 – 06/2021

Locum Neurosurgeon

North Colorado Medical Centre, Greeley, CO

  • 07/ 2017 – 07/2019

Attending Neurosurgeon

St Cloud Hospital, CentraCare Health, St Cloud, MN

  • 01/2016 – 06/2017

Consultant Neurosurgeon

Euroclinic Hospital, Athens, Greece

  • 08/2014– 12/2015

Consultant Neurosurgeon

“G. Gennimatas” Hospital, Athens, Greece

  • 07/ 2008 – 07/2014

Neurosurgery Resident/Chief Resident

Department of Neurological Surgery, Case Western Reserve School of Medicine

University Hospitals of Cleveland, Cleveland, OH

  • 07/ 2007 – 06/2008:

General Surgery Intern

Department of Surgery, New York Medical College

St Vincent’s Hospital Manhattan, New York, NY

  • 07/2006 – 06/2007:

Postdoctoral Research Associate

Department of Neurological Surgery

The Weill Medical College of Cornell University, New York, NY

  • 07/2005 – 06/2006:

Neurosurgical Oncology and Gamma-Knife Radiosurgery Fellow

Department of Neurosurgery, Roswell Park Cancer Institute, Buffalo, NY

  • 07/2004 – 06/2005:

Neurosurgery Fellow

Department of Neurosurgery New York Medical College,

St Vincent’s Hospital Manhattan, New York, NY

  • 09/2003 – 06/2004:

Neurosurgery Fellow

The Georgia Neurosurgical Institute, P.A.

The Medical Centre of Central Georgia, Macon, GA

  • 01/ 2002 – 08/ 2003:

Neurosurgery Resident

Department of Neurosurgery, Evangelismos Hospital

University of Athens School of Medicine, Athens, Greece

  • 11/ 2000 – 12/ 2001:

General Surgery Intern

Department of General Surgery “P. & A. Kyriakou” Hospital, Athens, Greece

  • 01/ 1999 – 05/ 2000:

Senior House Officer

District General Hospital of Chalkis, Evia, Greece

  • 05/ 1997 – 12/ 1998:

Mandatory Greek Army Service

  • 10/ 1996 – 04/ 1997:

Greek State Medical License: mandatory practice and examination


  • 05/ 1996 – 07/ 1996

The Royal Infirmary of Edinburgh, Edinburgh, UK

University Department of Surgery

  • 10/ 1995 –11/ 1995

The Hospital for Sick Children, Toronto, Canada

Department of Hematology-Oncology


Euclidean Geometry exercise solving, Swimming, Calisthenics,

Piano playing, Classical Music, Literature

Invited Faculty

The AANS Goodman Oral Board Preparatory Course, Fall 2021, Director: Alan D. Levi MD PhD FAANS


Book Chapters:

Laser-Induced Interstitial Thermotherapy of Gliomas.
Karampelas I, Sloan AE.
Prog Neurol Surg. 2018; 32: 14-26.

Peer-Reviewed Journal Articles:

Long-term time series forecasting and updates on survival analysis of glioblastoma multiforme, a 1975-2018 population-based study
Alexopoulos G, Zhang J, Karampelas I, Patel M, Kemp J, Coppens J, Mattei TA, Mercier P Neuroepidemiology. 2022; Feb 16

Applied forecasting for delayed cerebral ischemia prediction post-subarachnoid hemorrhage: Methodological fallacies
Alexopoulos G, Zhang J, Karampelas I, Khan M, Quadri N, Patel M, Patel N, Almajali M, Mattei TA, Kemp J, Coppens J, Mercier P
Informatics in Medicine Unlocked (2002)

A Role for Sox2 in the Adult Cerebellum.

Mandalos NP, Karampelas I, Saridaki M, McKay RDG, Cohen ML, Remboutsika E.
J Stem Cell Res Ther. 2018; 8(7).

Variants of the elastin (ELN) gene and susceptibility to intracranial aneurysm: a synthesis of genetic association studies using a genetic model-free approach.
Paterakis K, Koutsias S, Doxani C, Xanthopoulou P, Kokkali C, Mpoulimari I,
Tziastoudi M, Karampelas I, Dardiotis E, Hadjigeorgiou G, Brotis AG, Zintzaras E.
Int J Neurosci. 2016 Aug 14:1-6.

Sox2 acts as a rheostat of epithelial to mesenchymal transition during neural crest development.
Mandalos N, Rhinn M, Granchi Z, Karampelas I,Mitsiadis T, Economides AN, Dollé P, Remboutsika E
Front Physiol. 2014 Sep 12; 5:345

Translabyrinthine resection of small intracanalicular acoustic tumor.
Karampelas I, Wick C, Semaan M, Megerian CA, Bambakidis NC.
Neurosurg Focus. 2014 Jan;36(1 Suppl):1

Petroclival meningiomas: an update on surgical approaches, decision making, and treatment results.
Xu F, Karampelas I, Megerian CA, Selman WR, Bambakidis NC
Neurosurg Focus.2013 Dec;35(6):E11.

Improvement of neurological recovery and stimulation of neural progenitor cell proliferation by intrathecal administration of Sonic hedgehog.
Bambakidis NC, Petrullis M, Kui X, Rothstein B, Karampelas I, Kuang Y, Selman WR, LaManna JC, Miller RH.
J Neurosurg. 2012 May;116(5):1114-20. Epub 2012 Feb 10.

Interstitial infusion of glioma-targeted recombinant immunotoxin 8H9scFv-PE38.
Luther N, Cheung N-K, Souliopoulos EP, Karampelas I, Bassiri D, Edgar MA, Guo
HF, Pastan I, Gutin PH, Souweidane MM
Mol Cancer Ther2010;9:1039–46Cance

Interstitial infusion of erlotinib in the rodent brain
Luther N, Karampelas I, Souliopoulos N, Edgar MA, Boockvar JA, Souweidane MM
J Exp Ther Oncol 2009 8 (2) 79-84

Subthalamic nucleus breast metastasis causing hemichorea-hemiballism treated by gamma-knife stereotactic radiosurgery
Karampelas I, Podgorsak MB, Plunkett RJ, Fenstermaker RA
Acta Neurochirurg2008 150 (4) 395-6

Aggressive relapse of multiple myeloma with intracerebral extension and associated hemorrhage
Reddy N, Karampelas I, Chanan-Khan A, Fenstermaker R, Padmanabhan S
Leuk Lymphoma. 2007 Jun (6): 1228-30

Diagnosis and conservative management of an arteriovenous fistula of the scalp following awake craniotomy for tumour resection
Karampelas I, Kuensting JM, Cole PM, Fenstermaker RA

Acta Neurochirurg 2007 149(7): 727-8

Intratumoral hemorrhage after remote subtotal microsurgical resection and gamma knife radiosurgery for vestibular schwannoma
Karampelas I, Alberico RA, Plunkett RJ, Fenstermaker RA
Acta Neurochirurg 2007 149(3): 313-317

Review of the literature regarding the relationship of rebleeding and external ventricular drainage in patients with subarachnoid hemorrhage of aneurismal origin.
Fountas KN, Kapsalaki EZ, Machinis T, Karampelas I, Smisson HF, Robinson JS.
Neurosurg Rev. 2006 Jan;29(1):14-8; discussion 19-20.

Quantitative pupillometry: normative data in healthy pediatric volunteers
Boev AN, Fountas KN, Karampelas I, Boev C, Machinis TG, Feltes C, Okosun I, Dimopoulos V, Troup C.
J Neurosurg 2005 Dec;103(6 Suppl):496-500

Adult paravertebral pleomorphic rhabdomyosarcoma infiltrating diffusely the whole spinal axis
Fountas KN, Donner RS, Nikolakakos LG, Feltes CH, Karampelas I, Robinson JS Jr
 Journal of Neurosurgery: Spine 2005 2: 344-348

Primitive supratentorial neuroectodermal tumor in an adult.
Kouyialis AT, Boviatsis EI, Karampelas I, Korfias S, Korkolopoulou P, Sakas DE.
J Clin Neurosci. 2005 May;12(4):492-5.

Results of long-term follow-up in patients undergoing anterior screw fixationfor type II and rostral type III odontoid fractures
Fountas KN, Kapsalaki EZ, Karampelas I, Felters CH, Dimopoulos VG, Nikolakakos LG, Boev AN, Choudri H, Smisson HF, Robinson JS Jr
Spine 2005 30: 661-669

Primary spinal cord oligodendroglioma: Case report and review of the literature
Fountas KN, Karampelas I, Nikolakakos LG, Troup EC, Robinson JS Jr
Child’s NervSyst2005 21: 171-175

Sciatica: A historical perspective on early views of a distinct medical syndrome
Karampelas I, Boev A, Fountas KN, Robinson JS Jr
Neurosurg Focus 2004 16(1): E6

Emergency room neurosurgery: modern time errors.
Karampelas I, Fountas KN.
South Med J. 2004 Nov;97(11):1066-7.


1) Safety of interstitial infusion of 8H9-PE38 to the pons for application in a glioma model

Luther N, Karampelas Ioannis, Cheung N V, Dunkel IJ, Edgar MA, Gutin PH, Souweidane MM

37TH Annual Meeting of the AANS/CNS section of Pediatric Neurosurgery,

Spokane, Washington, WA 2008

2) Efficiency and Surgical Safety in Clipping of Cerebral Aneurysms using a preoperative 3D-interactive Surgery Rehearsal Platform (SRP)

Ioannis Karampelas, Sunil Manjila, Shakeel Chowdhry, Moty Avisar, Alon Geri, Martha Sajatovic, Curtis Tatsuoka, Andrew E Sloan, Nicholas C Bambakidis, Warren R Selman

Ohio State Neurosurgical Society Meeting, Columbus, OH 2013