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Specialty:
Medicine, Hematology
Medicine, Medical Oncology
Internal Medicine
Department Affiliation:
Medicine
Hospital Affiliation:
Ronald Reagan UCLA Medical Center
UCLA Medical Center, Santa Monica
State License:
A94238
Phone:
661-255-5350
Health Plans:
Accepted Plans
  • About Me
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About Me

Dr. Rena Callahan is a hematologist oncologist who practices in Santa Monica and Santa Clarita. She is active in the breast cancer research and treatment program, and also specializes in gynecologic malignancies. She is board certified in hematology and medical oncology, and is also an assistant clinical professor of medicine at the David Geffen School of Medicine at UCLA.

Dr. Callahan is dedicated to providing patient-centered care, and including her patients in clinical decision making so that their individual goals are met. She has a unique interest in the evolving treatment of breast cancer, and how complementary therapies, such as meditation, yoga and reiki can be integrated with Western evidence-based medicine.

Dr. Callahan received her medical degree from the University of Pennsylvania School of Medicine, where she graduated Alpha Omega Alpha, with high honors. She completed her internal medicine and hematology/oncology training at UCLA. She received her Bachelor of Science degree in biology from Yale University.

Dr. Callahan has spoken about the evolving treatment of breast cancer at both local and national meetings.

Links
uclahealth.org/community-cancercare
uclahealth.org/community-cancercare/santa-clarita
uclahealth.org/santa-clarita
uclahealth.org/community-cancercare/santa-monica
uclahealth.org/breasthealth
Primary Office
Cancer Care - Santa Clarita
Primary Address
27235 Tourney Road
Suite 2400
Valencia, California 91355
Get Directions
View Map
Phone
661-255-5350
Fax
661-255-9907
Secondary Office
Cancer Care - Santa Monica
Secondary Address
2336 Santa Monica Boulevard
Suite 315
Santa Monica, California 90404
Get Directions
View Map
Phone
310-829-5471
Fax
310-829-6192
Medical Board Certifications
Hematology, American Board of Internal Medicine, 2011
Certification 2
Medical Oncology, American Board of Internal Medicine, 2011
Fellowship
Hematology & Medical Oncology, UCLA School of Medicine, 2008-2011
Residency
Internal Medicine, UCLA School of Medicine, 2005-2007
Internship
Internal Medicine, UCLA School of Medicine, 2004-2005
Degree
University of Pennsylvania School of Medicine, MD, 2004
Research Interests
  • Breast Cancer
  • Treating side effects of cancer therapy
Publications
  1. Evaluation of an NP-based model of palliative care delivery within an oncology clinic. Sarah F. DAmbruoso, Neil Wenger, Anne Coscarelli, Sara A. Hurvitz, Christopher Pietras, Meghan Nechrebecki, Jennie Kung, Rena Desai Callahan, Jonathan Wade Goldman, Parvin F. Peddi, Drakaki Alexandra, Samuel A. Skootsky, and Anne Margaret Walling Journal of Clinical Oncology20173531_suppl163-163
  2. R J Hartmaier, S E Trabucco, N Priedigkeit, J H Chung, C A Parachoniak, P Vanden Borre, S Morley, M Rosenzweig, L M Gay, M E Goldberg, J Suh, S M Ali, J Ross, B Leyland-Jones, B Young, C Williams, B Park, M Tsai, B Haley, J Peguero, R D Callahan, I Sachelarie, J Cho, J M Atkinson, A Bahreini, A M Nagle, S L Puhalla, R J Watters, Z Erdogan-Yildirim, L Cao, S Oesterreich, A Mathew, P C Lucas, N E Davidson, A M Brufsky, G M Frampton, P J Stephens, J Chmielecki, A V Lee; Recurrent hyperactive ESR1 fusion proteins in endocrine therapy-resistant breast cancer, Annals of Oncology, Volume 29, Issue 4, 1 April 2018, Pages 872–880, https://doi.org/10.1093/annonc/mdy025
  3. Jennifer S. Woo, Neda A. Moatamed, Peggy S. Sullivan, David Y. Lu, Rena Callahan et al. (2015) Comparison of Phosphohistone H3 Immunohistochemical Staining, Ki-67, and H&E Mitotic Count in Invasive Breast Carcinoma. Journal Of Breast Cancer Survival - 1(1):1-11.
  4. Ponec, R., Peddi, P., Callahan, R. "Parp inhibitors in Breast Cancer: Latest Evidence." Current Breast Cancer Reports. Vol 9, 2017.
  5. Rena Callahan. Ado-Trastuzumab Emtansine in Metastatic HER2-Positive Breast Cancer. J Adv Pract Oncol. 2014 Mar-Apr; 5(2): 134–139.
  6. Rena D. Callahan, Patricia A. Ganz. “Side Effects of Systemic Therapy: Neurocognitive, Cardiac, and Secondary Malignancies.” Diseases of the Breast, 5th edition, Ed. Jay R. Harris, MD, Marc E. Lippman, MD, Monica Morrow, MD, and C. Kent Osborne, MD. Lippincott Williams and Wilkins, May 2014, 1224. ISBN: 978-1-4511-8627-7.
  7. RD Callahan, SA Hurvitz. HER2-Positive Breast Cancer: Current Management of Early, Advanced, and Recurrent Disease. Current Opinions in Obstetrics and Gynecology, 2011 Feb. 23 (1):37-43.
  8. R.Callahan, R. Patel, D.Chan, M.Allison, B. Dicarlo, L. Bosserman, A. Kennedy, L.M. Zehngebot, J. Miller, A.E. Giuliano, B. Spivack, L.S. Lin, D.J. Slamon, S.A. Hurvitz. Phase II Trial of Presurgical Treatment with Trastuzumab (H) or Lapatinib (Ty) or the Combination of Trastuzumab and Lapatinib (H+Ty), Followed by Six Cycles of Docetaxel (T) and Carboplatin (C) with Trastuzumab (TCH) or Lapatinib (TCTy) or the combination of Trastuzumab and Lapatinib (TCHTy) in Patients with HER2+ Breast Cancer. 2010 San Antonio Breast Cancer Symposium, December 2010.
  9. Richard P. Tonino, Pierre J. Meunier, Ronald Emkey, Jose A. Rodriguez-Portales, Charles-Joel Menkes, Richard D. Wasnich, Henry G. Bone, Arthur C. Santora, Mei Wu, Rena Desai, and Philip D. Ross. “Skeletal benefits of Alendronate: 7-Year Treatment of Postmenopausal Osteoporotic Women.” J. Clin. Endocrinol. Metab. 2000. 85: 3109-3115.
  10. Rena Desai Callahan, K. Rajender Reddy. “Liver Disease in Pregnancy.” The Clinician’s Guide to Liver Disease. Ed. Reddy KR and Faust T. Philadelphia: Slack, 2006: 211-230.
  11. Richard P. Tonino, Pierre J. Meunier, Ronald Emkey, Jose A. Rodriguez-Portales, Charles-Joel Menkes, Richard D. Wasnich, Henry G. Bone, Arthur C. Santora, Mei Wu, Rena Desai, and Philip D. Ross. “Efficacy and Tolerability of Alendronate (7 years), and Effect of Discontinuation.” The 8th Annual Congress on Women’s Health and Gender Based Medicine, Hilton Head, SC, June 2000.
  12. Rena Desai, Kirti Shetty, Kim M. Olthoff, Abraham Shaked, Colleen M. Brensinger, K. Rajender Reddy. The Tokyo Score in the Prognosis of Hepatocellular Carcinoma. Young Investigator’s Forum, Controversies in Transplantation. March 2004.
  13. Christopher Gasink, Stephen Rulyak, Stephen Rubesin, Rena Desai, James Lewis, Bernard Birnbaum, Jill E. Jacobs, Matthew Gardiner, Gary R. Lichtenstein. Ileal Thickening: Radiographic Features Predictive of Crohn's Disease on Abdominal CT Scan. Digestive Disease Week, May 2004.
  14. Rena Callahan, Ashkan Lashkari, Baldeep Singh. Myositis Ossificans. Society for General Internal Medicine Annual Meeting, March 2006.
In The News
Winter 2016 Ask the Expert: Neoadjuvant Therapy - (lbbc.org)
The science of why human breasts are so big - (businessinsider.com)

Note: News links may expire without notice.

Awards
  • Super Doctors Southern California Rising Stars (2018, 2017, 2016)
  • Henry Mayo Newhall Hospital Foundation, "Healthcare Hero" 2018, 2017, 2016, 2015
  • Commendation for Excellence in Medical Student Teaching, UCLA, 2007
  • Commendation for Excellence in Medical Student Teaching, UCLA, 2006
  • Commendation for Excellence in Medical Student Teaching, UCLA, 2005
  • Russell J. Stumacher Memorial Award, for academic and artistic excellence, University of Pennsylvania School of Medicine, 2004
  • Glasgow Rubin Award, for academic excellence, University of Pennsylvania School of Medicine, 2004
  • Alpha Omega Alpha medical honor society, inducted 2003
  • Yale Class of 1956, Summer Fellowship for Study Abroad, 1996
Webinar URL

Other Videos

Understanding and Treating HER2+ Breast Cancer

 

Medical Education

Breast Cancer 2017: Not Your Mother’s Treatment Options
Breast Cancer Treatment: Past, Present, and Future - September 9, 2014
Rena Callahan, MD click here to update your profile
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