Ira J. Bleiweiss, MD

Professor of Pathology and Laboratory Medicine at the Hospital of the University of Pennsylvania
Department: Pathology and Laboratory Medicine
Contact information
Hospital of the University of Pennsylvania
Founders 6
3400 Spruce St.
Philadelphia, PA 19104
Founders 6
3400 Spruce St.
Philadelphia, PA 19104
Office: 215-662-2569
Fax: 215-615-0463
Fax: 215-615-0463
Email:
ira.bleiweiss@uphs.upenn.edu
ira.bleiweiss@uphs.upenn.edu
Education:
BA (Biological Basis of Behavior)
University of Pennsylvania, 1980.
MD
St. George's University School of Medicine, Grenada, West Indies, 1984.
Permanent linkBA (Biological Basis of Behavior)
University of Pennsylvania, 1980.
MD
St. George's University School of Medicine, Grenada, West Indies, 1984.
Selected Publications
Tondi Resta I, Nelson ND, Toorens E, Bleiweiss IJ, Nayak A : Mucinous Cystadenocarcinomas of the Breast Exhibit Heterogeneous Genomic Profile as Triple Negative Breast Cancer, Harbor Alterations in PIK3CA, PTEN, AKT1, and GNAS Genes, and May Not Be Indolent. Int J Surg Pathol April 2025.Avalos Hernandez SR, Hu T, Dumoff KL, Vickery JM Bleiweiss IJ, Nayak A: Invasive lobular carcinoma with extracellular mucin (ILCEM) presenting at distant metastases and recurrences may exhibit triple negative phenotype. Mod Pathol March 2025 Notes: Poster presented at the United States and Canadian Academy Pathologists Annual Meeting.
Narasimhamurthy M, Le A, Boruah N, Moses R, Kelly G, Bleiweiss I, Maxwell KN, Nayak A.: Clinicopathologic Features of Breast Tumors in Germline TP53 Variant-Associated Li-Fraumeni Syndrome. Am J Surg Pathol 49: 195-205, March 2025.
Nayak A, Demarest K, Bleiweiss IJ, Shah PD: Pathologic response of metaplastic carcinomas to KEYNOTE-522 regimen: correlation with histological subtypes. Mod Pathol March 2025 Notes: Poster presented at the United States and Canadian Academy Pathologists Annual Meeting.
Tondi Resta I, Hu T, Dumoff KL, Avalos Hernandez SR, Vickery JM Bleiweiss IJ, Nayak A: Tubulopapillary carcinomas of the breast: histopathologic features, immunohistochemical staining with p16, p53, and SOX10, and molecular findings. Mod Pathol March 2025 Notes: Poster presented at the United States and Canadian Academy Pathologists Annual Meeting.
Tondi Resta I, Goldbach MM, Tchou JC, Bleiweiss IJ, Nayak A: Pathologic Features and Residual Cancer Burden (RCB) after Neoadjuvant Endocrine Therapy (NET) in Hormone Receptor Positive Breast Cancer (HR+ BC). Mod Pathol March 2024 Notes: Poster presented at the United States and Canadian Academy Pathologists Annual Meeting.
Lennerz JK, Pantanowitz L, Amin MB, et al. : Ensuring remote diagnostics for pathologists: an open letter to the US Congress. Nat Med 12: 2453-2455, December 2022.
Narasimhamurthy M, Good M, Desai H, Le A, Bleiweiss IJ, Maxwell K, Nayak A: Clinico-pathological features of breast tumors associated with Li-Fraumeni Syndrome. Mod Pathology 35: 196-198, March 2022 Notes: Poster presented at the United States and Canadian Academy Pathologists Annual Meeting, Los Angeles, CA, March 2021.
Zhao X, Nayak A, Bleiweiss IJ: Does the status of the tumor bed at surgical margins affect local recurrence and overall prognosis in patients undergoing lumpectomy status post neoadjuvant therapy. Mod Pathology 35: 224-225, March 2022 Notes: Poster presented at the United States and Canadian Academy Pathologists Annual Meeting, Los Angeles, CA, March 2021.
Hawrot K, Shulman LN, Bleiweiss IJ, Wilkie EJ, Jankowitz RC, Laughlin AI: Time to Treatment Initiation for Breast Cancer during the 2020 COVID-19 Pandemic. JCO Oncology Practice 17(9): 534-540, September 2021.