John Tomaszewski

John E. Tomaszewski

John E. Tomaszewski MD, MASCP

UBMD Pathology


Anatomic Pathology; Bioinformatics; Biomedical Image Analysis; Biomedical Imaging; Clinical Pathology; Digital Pathology; Immunopathology; Molecular and Cellular Biology; Renal Pathology; Surgical Pathology

Hospital-based provider only

Professional Summary:

Patient care for a Pathologist is centered on assisting patients and clinicians in the understanding and the use of clinical laboratory data for the planning of therapeutic decisions. My personal specialty focus areas are in renal pathology, immunopathology, and urological pathology. I provide tissue biopsy and clinical laboratory diagnose , prognoses, and therapeutic advice to patients and clinicians on medical and surgical diseases of the kidney (including kidney transplants), bladder, prostate , and testis. These services include the interpretation of biopsies and pathology specimens, consultations on the ordering and/or the results of clinical laboratory lab tests.

Raised in Philadelphia, PA I received my undergraduate education from LaSalle College in Philadelphia in 1973. I attended the University of Pennsylvania School of Medicine and received my MD in 1977. After finishing medical school I did an internship in Internal Medicine at Pennsylvania. I completed my Pathology Residency in anatomic and clinical pathology at the Hospital of the University of Pennsylvania in 1982. During that training I had special concentrations in immunology, HLA testing, and nephropathology. I was a Fellow in Surgical Pathology in 1982-1983. I joined the faculty in the Department of Pathology and Laboratory Medicine at the University of Pennsylvania in 1983. In my first year of appointment I was given the opportunity to do a specially arranged fellowship with Dr. Conrad Pirani in Nephropathology at Columbia University. At Penn I rose through the ranks to become Professor, Vice Chair for Anatomic Pathology-Hospital Services, and Interim Chair of the Department of Pathology and Laboratory Medicine

My research interests are translational and have been focused in the domain of genitourinary pathology. Over the last decade I have had the great opportunity to work collaboratively with a group of image scientists in the development of quantitative image analysis tools tailored to the needs of the digital pathology community. Our vision is to create a new analytic paradigm fusing the data from the quantitative analysis of high resolution images with multidimensional molecular data. This “fused diagnostics” approach will support personalized predictive modeling of disease and its response to therapy. Our collaborative group is funded and is working hard to develop platforms which will support this new way of addressing complex multivariable testing.

Over the years I have had the great good fortune to teach many classes of undergraduate medical students in nephropathology and genitourinary pathology. I have been Program Director of the Surgical Pathology and Immunopatholgy Fellowships at the Hospital of the University of Pennsylvania and instructed 56 Fellows. I have been a member of 9 PhD and 1 MS candidates’ thesis committees. I continue to instruct at the UME, GME, and Graduate student levels.

I have been active in the work of many Pathology societies both as a speaker and in varied leadership roles. My volunteer work has been with the ACSP, USCAP, CAP, Pathology Informatics, ASIP, ICPI, and APC. I was a member of the ASCP Board of Directors for many years and rose through the leadership sequence to be elected ASCP President for 2010-2011. My society work has helped me understand both the challenges and the opportunities which face our profession in these times of great change.

In 2011 I moved from Philadelphia to Buffalo to become Chair of Pathology and Anatomical Sciences at the University at Buffalo, State University of New York. I continue to maintain an active collaborative research program in image science and focus my efforts as Chair on building our clinical, educational, and research programs at UB. I am excited to be part of this great University which is on the rise.


Anatomic Pathology, Bioinformatics, Biomedical Image Analysis, Biomedical Imaging, Clinical Pathology, Digital Pathology, Immunopathology, Molecular and Cellular Biology, Renal Pathology, Surgical Pathology

Physician Gender:


Hospital Locations (for inpatients only):

  • Department of Pathology
  • Kaleida Health Center for Laboratory Medicine

Board Certifications:

  • Certification, American Board of Pathology, Anatomic and Clinical Pathology

Education and Training:

  • Fellowship, Renal Pathology, specially arranged, Columbia University (1984)
  • Fellowship, Surgical Pathology, Hospital of the University of Pennsylvania (1983)
  • Residency, Pathology and Laboratory Medicine, Hospital of the University of Pennsylvania (1982)
  • Internship, Internal Medicine, Pennsylvania Hospital (1978)
  • MD, Medicine, University of Pennsylvania School of Medicine (1977)
  • BA, LaSalle College (1973)

Awards and Honors:

  • State University of New York Distinguished Academy Board (2021)
  • Gold Foundation Champion of Humanistic Care Award (2021)
  • America's Most Honored Doctors (2020)
  • 2018 Health Care Champion - Buffalo (2018)
  • SUNY Distinguished Professor (2017)
  • Dean's Award (2016)
  • Top Physicians Reginition, Buffalo Spree 2016 (2016)
  • College of American Pathologist Inspector Recognition Program (2015)
  • America's Top Doctors, Castle Connolly Listing (2015)
  • AcademicKeys Who;s Who in Sciences Higher Education Listing (2014)
  • America's Top Doctors for 10 Years: Castle Connolly Listing (2014)
  • America's Top Doctors for Cancer: Castle Connolly Listing (2014)
  • Mastership Award, American Society for Clinical Pathology (2014)
  • AOA Distinguished Lecturer (2013)
  • America's Top Doctors for Cancer:Castle Connolly Listing (2013)
  • Academic Keys Who's Who in Medicine Higher education (2012)
  • President’s Recognition Award (2011)
  • Philadelphia Magazine's "Top Doctors" Listing (2010)
  • David B.P. Goodman Award (2010)
  • Philadephia Magazine's "Top Doctors" Listing (2009)
  • America's Top Doctors for Cancer, 5th Ed (2009)
  • Academic Keys Who's Who in Medicine Higher Education (2008)
  • Philadelphia Magazine’s “Top Doctors” Listing (2008)
  • Philadelphia Magazine’s “Top Doctors” Listing (2007)
  • UPHS 2007 Quality and Patient Safety Award (2007)
  • Nominated by Class of 2010 for Best Lecturer in Module 2 Renal Block and Best Lecturer in Module 2 Pathology (2007)
  • America’s Top Doctors Listing, 7th ed (2007)
  • America’s Top Doctors for Cancer, 3rd ed (2007)
  • 2006 Philadelphia Magazine’s “Top Doctors” Listing (2006)
  • America’s Top Doctors Listing, 6th ed (2006)
  • America’s Top Doctors for Cancer, 2nd ed (2006)
  • America’s Top Doctors Listing, 5th ed (2005)
  • Philadelphia Magazine’s “Top Doctors” Listing (2005)
  • America’s Top Doctors for Cancer, 1st ed (2005)
  • America’s Top Doctors Listing, 4th ed (2004)
  • 2004 CDC Public Health Practice Program Office (PHPPO) Award (2004)

Innovations and Patents:

  • "Systems and Methods for Automated Detection of Cancer",
  • “Malignancy Diagnosis Using Content-Based Image Retrieval of Tissue Histo
  • "System and Method for Image Registration"
  • "Computer Assisted Diagnosis (CAD) of cancer using Multi-Functional Multi-M
  • “Cancer Detection from Whole Mount Histology Specimens,”

Research Profile:

This UBMD physician is also a member of the Jacobs School of Medicine and Biomedical Sciences at the University at Buffalo, teaching the next generation of doctors and researching to advance care in WNY and beyond. Learn more about this physician's research and teaching activities, as well as view credentials, publications, professional involvement and more below.

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