Education & Background
Clinical Training and Experience
Hospital and Academic Appointments
Honors & Awards Summary
Specialization and Medical Society Memberships
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Continuing Medical Education and Recent Lectures
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Daniel E. Nijensohn, MD, MSc, PhD, FACS, FAANS (L)

Dr. Nijensohn was born and raised in Mendoza, Argentina where he graduated as physician (MD) from the National University of Cuyo Medical School in 1970. He was the Valedictorian, graduating Summa cum laude and Gold Medalist, ranking First in his Class. A 2012 study done at the National University of Cuyo School of Medicine, found Dr. Nijensohn to be the graduate with the highest grade point average (numerical system) since that medical school was founded in 1950. (See Addendum # 1).

As a Senior Medical Student he served as Medical Volunteer in Israel in the 1967 Six-Day-War at Tel-Hashomer Military Hospital, Tel Aviv, under Dr. Chaim Sheba.

Dr. Nijensohn interned at the University of Buenos Aires Teaching Hospitals, in Buenos Aires, Argentina. He worked at the Institute of Clinical Surgery, Hospital de Clinicas, under Dr. Mario Brea and at the Institute of Medical Research, under Dr. Alfredo Lanari.

In 1970 he immigrated to the United States to train as a neurosurgeon and became a US Citizen in 1980.

He did a rotating surgical internship at Baylor College of Medicine in the Department of Surgery led by Dr. Michael E. DeBakey, at the Texas Medical Center Houston, Texas. He then moved to Rochester, Minnesota where he did his general surgical and neurosurgical training at the Mayo Clinic, between July 1971 and December 1976. The Department of Neurologic Surgery was chaired by Dr. Collin S. MacCarty. At the end of his training he was appointed Chief Resident Associate to the Staff, Mayo Clinic and Mayo Graduate School of Medicine.

While a Resident-Fellow at the Mayo Clinic, he was also enrolled as a Graduate Student, University of Minnesota. He obtained a Master of Science in Neurosurgery, University of Minnesota (MSc), for experimental work done in the laboratory of Dr. Frederick W. L. Kerr, as well as a Doctorate in Medicine with special emphasis in neuroanatomy from the National University of Cuyo Medical School (1976, PhD, Doctor en Medicina). He had further fellowship training in microvascular surgery at the University of Vermont in Burlington (Dr. Peardon Donaghy), in stereotactic radiosurgery at the Karolinska Institute in Stockholm, Sweden, and in spinal reconstruction and stabilization techniques at multiple institutions.

He is a Diplomate of the American Board of Neurological Surgery (DABNS), a Fellow of the American College of Surgeons (FACS), and Fellow of the American Association of Neurological Surgeons, Life- time Member (FAANS-L).

He has practiced neurosurgery in Connecticut since January 1977 when he joined Connecticut Neurological Surgeons (a group practice started in 1947 in Bridgeport, Connecticut by Dr. Irving J. Sherman, a Walter Dandy trainee). He has served as the senior, founding member and consultant at the Neurosurgical Group Brain, Spine and Nerve Center, since 1985. His high-volume and diverse general neurosurgical practice has included adult and pediatric cases, spine, trauma, neuro-oncology, cerebrovascular, stereotactic and functional, pituitary, carotid artery, peripheral nerve, and Gamma Knife Stereotactic Radiosurgery.

He is Emeritus Staff at St. Vincent's Medical Center (Chief of Neurosurgery 1985-2005), Bridgeport, Connecticut and Honorary Staff at Bridgeport Hospital, former Active Staff at Yale-New Haven Hospital, and at the Yale Gamma Knife Center, New Haven, Connecticut.

Dr. Nijensohn is an Honorary (Emeritus) Professor, Yale University School of Medicine, having served in the Clinical Faculty, climbing all the academic ranks, initially in the Section and then in the Department of Neurosurgery, appointed in 1977 by Dr. William F. Collins, Jr.

He has twice served as President, Connecticut State Neurosurgical Society, and is a past Trustee of the New England Neurosurgical Society. He has been active in local, regional, national, and international neurosurgical organizations. He represented the State of Connecticut for many years at the Joint Council of State Neurosurgical Societies of the American Association of Neurological Surgeons and the Congress of Neurological Surgeons. In addition to having been Chief of Neurosurgery at St. Vincent's Medical Center and having served as Senior Neurosurgeon in all the Bridgeport Hospitals, he has shown leadership in multiple intramural and extramural activities. Besides being a Professor at Yale University School of Medicine, Department of Neurosurgery, he has also lectured extensively and on many occasions on multiple subjects in Connecticut and throughout New England, Florida, Minnesota, and other places in the US, Mexico, Argentina, Brazil, Israel, and many other countries, as well as in the high seas. He has been a Visiting Professor at the Hebrew University, Hadassah Medical Center, Jerusalem, Israel; at the Hospital Angeles, Mexico; at the Centro Medico Nacional 20 de Noviembre; at the Cushing Institute, North Shore University Hospital, Long Island, New York; Universidad Nacional de Cuyo, Mendoza, Argentina; University Club, Orlando, Florida; Mayo Clinic, Rochester, Minnesota, and many other institutions. He delivered a lecture as the featured guest speaker at the 28th International Symposium of Endovascular Therapy (ISET) in Hollywood, Florida in 2016. He has been a Guest Lecturer and Conversationalist in Enrichment Programs aboard cruise ships, with Silversea, Seabourn, Oceania cruise lines, among others, discussing a wide variety of subjects (see the list of lectures in the appropriate page of this website).

Dr. Nijensohn's neurosurgical special interests and expertise include the ethics of neuroscience, medical professionalism, surgical treatment of spine disease (cervical and lumbar, both minimally invasive and with reconstruction instrumentation techniques with computer-assisted image-guided navigation) , neurosurgery for pain, as well as of intracranial brain disease such as brain and pituitary tumors, transphenoidal approaches to the pituitary, trigeminal neuralgia (with special emphasis on Gamma Knife radiosurgical treatment) and history of medicine, neurosurgery, psychosurgery and deep brain stimulation and neuromodulation.

Dr. Nijensohn's biography was published in the Argentine Journal of Neurosurgery (Revista Argentina de Neurocirugía, Volumen 2, 2010) on July, 2010. View Biography Here

Other biographical essays:
  • "Reflexiones personales de un Médico"; Revista Médica Universitaria, Vol.7, no.1, 2011,
    "Me siento un mendocino de pura cepa": Revista de la Universidad de Mendoza, Pablo Bekerman, 2011, Link
  • "Sintesis de Memoria de un Neurocirujano: Daniel Nijensohn", Alberto Kaplan blog, Octubre 10, 2014:
  • "De la Memoria de un Neurocirujano" Revista de la Facultad de Ciencias Médicas de la Universidad Nacional de Cuyo
  • Médicos mendocinos por el mundo, Los Andes, Lunes 22 de diciembre, 2014
  • "A Neurosurgeon Remembers: From Argentina to New England"; AANS Neurosurgeon Timeline. Volume 23, Number 4 , December 2014,
  • Mayo Clinic Alumni Association: Daniel E. Nijensohn, M.D., Ph.D., (NS'77) - From Argentina to New England
  • "A Neurosurgeon Remembers"; Reflections on Medicine, Connecticut Medicine, Volume 79, Number 3 March 2015 ,

    He has been repeatedly chosen as a "Top Doctor", "Best Doctor", "Best Surgeon", by local, regional and national publications. His work has been featured by the world media in multiple newspaper articles. (Google Daniel E. Nijensohn, MD)

    Dr. Nijensohn led a team of researchers that investigated a prefrontal lobotomy on Eva Peron, Evita, performed before her death in 1952. This research, published by World Neurosurgery, Elsevier, NeuroTarget, Buenos Aires, Neurosurgical Focus (Journal of Neurosurgery, AANS) and Journal of Clinical Neuroscience (Melbourne, Australia) has been presented in multiple venues including the Fall Meeting of the Congress of Neurological Surgeons, Washington, DC, September, 2011 (View links to World Neurosurgery , NeuroTarget , CNS)(see addendum #2 link to FLANC, and link to Surgical Neurology.), American Association of Neurological Surgeons Annual Meeting, Washington, DC, May 6, 2015 (Panelist at Breakfast Seminar on Psychosurgery), Beaumont Medical Club Lecture, Yale Historical Library, Yale University School of Medicine, October 23, 2015.

    Dr. Nijensohn was interviewed in Argentina and in Connecticut by journalist-physician Dr. Nelson Castro who released a documentary in Buenos Aires in March, 2014 on the prefrontal lobotomy of Eva Peron. (El Juego Limpio, Lobotomia de Eva Peron, Una Historia Escalofriante). Castro published a book on Evita with a chapter on Dr. Nijensohn's findings. Dr. Daniel E. Nijensohn and his wife Goldie L. Nijensohn are writing a book on the secret surgical lobotomy performed on Eva Peron. His work has been featured in thousands of publications in the world's media.

    Dr. Nijensohn's father, Prof. Dr. Leon Nijensohn, a renowned soil scientist and academician, was included in a list honoring the 200 most prominent Argentine Jewish personalities in the 200-year-history of the Argentine Republic. Read Article (Biography # 165/200). Dr. Nijensohn and his wife Goldie wrote a Festschrift in honor of Professor León Nijensohn in 2008: Nijensohn, Daniel and Goldie: Leon Nijensohn, a Tribute, Published in 2008, New Haven, CT

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