Professional Endorsements


Dr. Robert Nagourney has earned international recognition as the most prominent leader in the field of chemosensitivity testing. 

For over two decades, my medical staff and I have included his chemosensitivity assay as an invaluable tool in helping us select the optimal chemotherapy regimen for our patients.

A more primitive proliferative assay led many to reject such testing early on. However, Dr. Nagourney's pioneering work, developing instead a more prominent apoptotic assay, has benefitted innumerable cancer patients and played a pivotal role in their treatment response and treatment outcome.

I believe all patients deserve the quality of information that Robert's testing provides, and that in the future, oncology practices will routinely incorporate such testing into the optimal care for patients.

— Keith I. Block, MD, Skokie, Illinois 


For more than five years and nearly 100 times, I have utilized the Rational Therapeutics (now Nagourney Cancer Institute) predictive test for tumor chemosensitivity.

The information influenced my treatment decisions at least 70% of the time, and there were many examples of extraordinary responses to drugs or combinations of drugs, which I never would have considered without the information.

— R. Michael Williams, MD, PhD, California Medical Oncologist


Rational Therapeutics (now Nagourney Cancer Institute) has performed many assays on tissue from my patients with gynecologic cancer that I have found very helpful in selecting appropriate chemotherapy (both single agents and combinations of agents).

Several patients come to mind that had very guarded prognoses and did very well following the guidance given us by the assay performed by Rational Therapeutics (now Nagourney Cancer Institute).

— Philip J. Di Saia, MD Chair, Gynecologic Oncology Group
Professor and Division Director, Division of Gynecologic Oncology, University of California, Irvine


No one in the United States has done more than Dr. Robert Nagourney in advancing the cause of chemosensitivity testing.

In my opinion, he is a true pioneer of cancer research and a hero to many, including those whose lives have been lengthened or saved by his work.

— Ralph W. Moss, Ph.D.
Author of 11 Books and 3 Documentaries on Cancer-Related Topics.  (Dr. Moss has received lifetime achievement awards from the American College for the Advancement of Medicine, Cancer Control Society, National Foundation for Alternative Medicine, Wellness Forum, and Center for Advancement in Cancer Education.)


Dr. Robert A. Nagourney - Nobel-quality researcher and clinical oncologist, extraordinary physician, and creative maverick - is the doctor I'd go to if I had cancer.

For decades, with relentless patience, he's been proving that many supposedly incurable cancers can be killed, with greatly reduced harm to the patient, simply by using agents preselected in the laboratory to kill those specific cancer cells.

— Amory B. Lovins
Chairman and Chief Scientist,  Rocky Mountain Institute  (named by Time magazine as one of the WORLD'S 100 MOST INFLUENTIAL PEOPLE IN 2009)


Everyone's cancer is different....Functional laboratory testing rescued my wife from certain death.  Her survival, now almost fourteen years later, was entirely due to Dr. Nagourney's identification of a drug combination rarely used in ovarian cancer in 1999, and not recommended by any of her seven gynecologic oncologists she consulted.

— Thomas Panke, M.D.
President, Southern Ohio Pathology Consultants, Inc.; Author, Pathology of Thermal Injury


Over the years, I have been privileged to be asked to provide samples to Rational Therapeutics (now Nagourney Cancer Institute) in patients that were stage 4 and in whom I felt their life expectancy would be measured in months.

Dr. Nagourney's assay and the subsequent chemotherapy have been the sole factor in many of these desperately ill patients being alive today, years after their treatment.

— Robert Shuman, MD, Thoracic Surgeon


Rational Therapeutics (now Nagourney Cancer Institute), led by pioneering medical oncologist and researcher Robert Nagourney, MD, provides an invaluable service for cancer patients and their doctors: A well-validated drug sensitivity test that is the most accurate and reliable in-vitro test currently available to assess the potential effectiveness of cancer drug regimens.

Dr. Nagourney is the class of this field, having developed a test based on a different principle than others on the market.

Namely, by measuring cell death (apoptosis) rather than proliferation — a principle that makes the test more accurate in predicting not only what drugs won't work, but what drugs and combinations will work. 

Dr. Nagourney's test has been validated over decades by correlative and clinical tests, proving that it provides superb guidance to clinicians seeking to optimize the efficacy of treatments for cancer patients, especially those with advanced and/or recurrent disease.

It is one of the few drug sensitivity assays that tests multi-drug combinations and many targeted therapies as well as chemotherapies. When the results from Rational Therapeutics (Nagourney Cancer Institute) testing is used as one important factor in designing personalized treatments for cancer patients, it can—and does—make a world of difference for the length and quality of their lives.

— Henry Dreher
Author, Your Defense Against Cancer and
Mind-Body Unity: A New Vision for Mind-Body Science and Medicine


I am extremely impressed by the assay methodologies (e.g. 3 dimensional spheriodal tumor growth, apoptosis assay endpoint data for both cytotoxic and biologic agents) and the very useful and timely interactions with Dr. Nagourney concerning the implications of the generated reports.

— David S. Alberts, M.D.
Regents Professor of Medicine, Pharmacology, Nutritional Sciences,
Public Health Director, Arizona Cancer Center


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