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5841 S. MARYLANDM/C 2115Chicago, IL 60637
Phone+1 773-702-5381
Fax+1 773-702-3163
Dr. Hahn is on Doximity
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Education & Training
University of ChicagoFellowship, Hematology and Medical Oncology, 2004 - 2007- University of ChicagoResidency, Internal Medicine, 2001 - 2004
Emory University School of MedicineClass of 2001
Certifications & Licensure
IL State Medical License 2004 - 2029
American Board of Internal Medicine Internal Medicine- American Board of Internal Medicine Medical Oncology
Awards, Honors, & Recognition
- CMS Meaningful Use Stage 2 Certification EpicCare Inpatient 2014 Certified EHR Suite, Epic Systems Corporation, 2013-2017
- CMS Meaningful Use Stage 1 Certification EpicCare Ambulatory - Core EMR, Epic Systems Corporation, 2013-2017
- CMS Meaningful Use Stage 2 Certification EpicCare Ambulatory 2014 Certified EHR Suite, Epic Systems Corporation, 2013-2017
Clinical Trials
- A Phase III Randomized Trial of Metformin vs Placebo in Early Stage Breast Cancer Start of enrollment: 2010 Aug 13
- Fulvestrant and/or Anastrozole in Treating Postmenopausal Patients With Stage II-III Breast Cancer Undergoing Surgery Start of enrollment: 2014 Feb 27
- Exemestane With or Without Entinostat in Treating Patients With Recurrent Hormone Receptor-Positive Breast Cancer That is Locally Advanced or Metastatic Start of enrollment: 2014 Mar 29
Publications & Presentations
PubMed
- 3 citationsEvaluation of cyclin-dependent kinase 4/6 inhibitor-induced serum creatinine elevations in patients with hormone receptor positive breast cancer.Emily Ly, Frederick M Howard, Nan Chen, Olwen Hahn, Gini F Fleming
Journal of Oncology Pharmacy Practice. 2026-06-01 - Retrospective evaluation of adjuvant capecitabine dosing patterns in triple negative breast cancer.Kun Lin, Elena Michaels, Eric Polley, Peter H O'Donnell, Frederick M Howard
Journal of Oncology Pharmacy Practice. 2026-01-01 - 10 citationsImpact of a Weight Loss Intervention on 1-Year Weight Change in Women With Stage II/III Breast Cancer: Secondary Analysis of the Breast Cancer Weight Loss (BWEL) Trial.Jennifer A Ligibel, Karla V Ballman, Linda McCall, Pamela J Goodwin, Catherine M Alfano
JAMA Oncology. 2025-10-01
Journal Articles
- Corrigendum to ‘Cabozantinib Versus Sunitinib as Initial Therapy for Metastatic Renal Cell Carcinoma of Intermediate or Poor Risk (Alliance A031203 CABOSUN Randomised ...Toni K Choueiri, Olwen Hahn, Thomas Olencki, Eric J Small, Shaker Dakhil, Darren R Feldman, European Journal of Cancer
Authored Content
- Corrigendum to ‘Cabozantinib Versus Sunitinib as Initial Therapy for Metastatic Renal Cell Carcinoma of Intermediate or Poor Risk (Alliance A031203 CABOSUN Randomised Trial): Progression-Free Survival by Independent Review and Overall Survival Update’ [Eur J Cancer 94 (May 2018) 115–125]September 2018
- Cabozantinib Versus Sunitinib as Initial Therapy for Metastatic Renal Cell Carcinoma of Intermediate or Poor Risk (Alliance A031203 CABOSUN Randomised Trial): Progression-Free Survival by Independent Review and Overall Survival UpdateApril 2018
Press Mentions
Bodybuilder’s Battle with Breast Cancer: “Emotionally I Was a Wreck.”January 27th, 2022
Grant Support
- Alliance for Clinical Trials in Oncology Operations CenterALLIANCE NCTN FOUNDATION2026–2032
- Alliance for Clinical Trials in Oncology Operations CenterALLIANCE NCTN FOUNDATION2026–2032
- Alliance for Clinical Trials in Oncology Operations CenterALLIANCE NCTN FOUNDATION2026–2032
- Alliance NCORP Research BaseALLIANCE NCTN FOUNDATION2014–2027
Professional Memberships
- Member
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