Ira. J. Bleiweiss, MD

Professor of Pathology and Laboratory Medicine at the Hospital of the University of Pennsylvania
Perelman School of Medicine at the University of Pennsylvania

Contact InformationHospital of the University of Pennsylvania
Founders 6
3400 Spruce St.
Philadelphia, PA 19104

Office: 215-662-2569
Fax: 215-615-0463

Specialty Division

Anatomic Pathology

Itmat Expertise

breast pathology diagnosis,
breast cancer predictive and prognostic markers


BA (Biological Basis of Behavior), University of Pennsylvania, 1980
MD St. George's University School of Medicine, Grenada, West Indies, 1984

Specialty Certification

Educational Commission for Foreign Medical Graduates (ECFMG) certification, 1983
Certified in Anatomic and Clinical Pathology, The American Board of Pathology. Recertified for 10 years (voluntary program), Jan 1, 2014., 1988
Certified Laboratory Director for General Histopathology, New York State Department of Health, 2003

Postgraduate Training

Clinical clerkships, The Methodist Hospital of Brooklyn, Manhattan State Psychiatric Center, 1983-1984
Resident in Anatomic/Clinical Pathology, The Mount Sinai Medical Center, New York, 1984-1988
Chief Resident in Anatomic/Clinical Pathology, The Mount Sinai Medical Center, New York, 1987-1988
Fellow in Surgical Pathology, The Mount Sinai Medical Center, New York, 1988-1989
Fellow in Anatomic Pathology, Memorial Sloan-Kettering Cancer Center, 1989-1990

Awards and Honors

Certificate of Merit for Scientific Exhibit at the 81st Annual Meeting of the Radiological Society of North America, Chicago: for "Benign enlarging non-palpable breast masses in post menopausal women" with collaborators., 1995-1995
Certificate of Merit for Scientific Exhibit at the 96th Annual Meeting of the American Roentgen Ray Society for "Benign enlarging non-palpable breast masses in post menopausal women" with collaborators., 1996-1996
Elected by his peers for inclusion in Best Doctors in America., 1996-2007
Listed in America’s Top Doctors: New York Metro Edition, 2003-2015
Honoree, the 13th Annual Celebration of Life Gala of the Mount Sinai Breast Health Resource Program, The Waldorf Astoria, New York, NY, 2005-2005
Listed in New York’s Best Doctors, 2007-2014
Listed in Top Ten Breast Cancer Papers 2008 at annual meeting of the American Society of Breast Surgeons for "Atypical duct hyperplasia at margin of breast biopsy – Is re-excision indicated?" with collaborators., 2008-2008
Elected by his peers for inclusion in Best Doctors in America., 2009-2015
Honoree, the 7th Gala Dinner Dance of Lean on Me, The North Ritz Club, Syosset, New York, NY, 2010-2010
Listed in New York Super Doctors, 2010-2015
Recipient of the Senior Pathology Faculty Recognition Award by Residents for Exceptional Performance in Resident Education in Anatomic Pathology, 2014-2014
Honoree, the Annual Dubin Breast Center Benefit, The Mandarin Hotel, New York, NY, 2014
Newsweek’s 2015 Top Cancer Doctors, 2015-2015

Memberships and Professional Organizations

New York Metropolitan Breast Cancer Group, 1990 - Present
New York Pathological Society, 1990 - Present
International Academy of Pathologists, US/Canadian Division, 1990 - Present
Society for Applied Immuno-histochemistry, 1991 - 1994
The American Society of Breast Disease, 1991 - Present
National Cancer Institute (NCI) Clinical Trials Cooperative Group Program, 1996 - Present
State of New Jersey Commission on Cancer Research, 2000 - 2002
Cancer Family Registry for Breast Cancer Studies (CFRBCS), 2002 - Present
Pathologists' Club of New York, 2003 - 2004
Association of Directors of Anatomic and Surgical Pathology, 2003 - Present
The New York Cancer Society, 2003 - 2009
The Arthur Purdy Stout Society of Surgical Pathologists, 2003 - Present
Young Survival Coalition: Young Women United against Breast Cancer, 2003 - Present
The International Sentinel Node Society, 2006 - Present
College of American Pathologists, 2009 - Present
The International Society of Breast Pathology, 2009 - Present
Agency for Healthcare Research and Quality Effective Health Care Program, Department of Health and Human Services, 2014 - 2014

Web Links

Selected Publications

Clinico-pathological features of breast tumors associated with Li-Fraumeni Syndrome

Narasimhamurthy M, Good M, Desai H, Le A, Bleiweiss IJ, Maxwell K, Nayak A, Mod Pathology 35(): 196-198, 2022

Does the status of the tumor bed at surgical margins affect local recurrence and overall prognosis in patients undergoing lumpectomy status post neoadjuvant therapy

Zhao X, Nayak A, Bleiweiss IJ, Mod Pathology 35(): 224-225, 2022

Time to Treatment Initiation for Breast Cancer during the 2020 COVID-19 Pandemic

Hawrot K, Shulman LN, Bleiweiss IJ, Wilkie EJ, Jankowitz RC, Laughlin AI, JCO Oncology Practice 17(9): 534-540, 2021, PMID:33710914

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Pathologic characterization of Non-Malignant Breast Lesions Detected by 3D-Digital Breast Tomosynthesis (DBT) versus 2D-Digital Mammography (DM).

Assi J, Bleiweiss I, Nayak A, Laboratory Investigation 101 (suppl 1)(): 79-81, 2021

Iatrogenic Issues in Breast Pathology

Bleiweiss IJ, Nayak A, The Breast Journal 26(6): 1179-1184, 2020, PMID:32383293

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Syringomatous Adenoma of Nipple (SAN), Low Grade Adenosquamous Carcinoma of Breast (LGASCA) and Microcystic Adnexal Carcinoma (MAC) of Skin: Molecular Analysis of these Rare Entities with Similar Histologic Features

Modi M, Bleiweiss I, Grenko R, Jaffer S, Toorens E, Ganguly T, Nayak A, Mod Pathol 33(Suppl. 2)(): 214, 2020

Early Results of PD-L1 Staining and Atezolizumab (atezo) Treatment (Tx) in Patients with Metastatic Triple Negative Breast Carcinoma (TNBC)

Peters J, Bleiweiss I, Zhang P, Feldman M, Dumoff K, Nayak A, Mod Pathol 33(Suppl. 2)(): 237-238, 2020

Characteristics of Screen-Detected Breast Cancer with and without 3D Tomography

Peters J, Zuckerman S, Conant E, Bleiweiss I, Nayak A, Mod Pathol 33(Suppl. 2)(): 238, 2020

Microglandular Adenosis: A Possible Non-Obligate Precursor to Breast Carcinoma With Potential to Either Luminal-Type or Basal-Type Differentiation.

Damron Alexander T, Korhonen Katrina, Zuckerman Samantha, Tchou Julia, Dumoff Kimberly L, Bleiweiss Ira J, Nayak Anupma, International journal of surgical pathology 27(7): 781-787, 2019, PMID:31046496

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Adenomyoepitheliomas of the Breast Frequently Harbor Recurrent Hotspot Mutations in PIK3-AKT Pathway-related Genes and a Subset Show Genetic Similarity to Salivary Gland Epithelial-Myoepithelial Carcinoma.

Lubin Daniel, Toorens Erik, Zhang Paul J, Jaffer Shabnam, Baraban Ezra, Bleiweiss Ira J, Nayak Anupma, The American journal of surgical pathology 43(7): 1005-1-13, 2019, PMID:31094929

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