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Catheryn Yashar, MD

Catheryn Yashar, MD

Associate Professor
Breast Cancer
Partial Breast Irradiation (PBI)
Gynecologic Cancers

Contact Information

Department of Radiation Medicine and Applied Sciences
Moores Cancer Center
3855 Health Sciences Drive, #0843
La Jolla, CA 92093-0843

Born and raised in Louisville, Kentucky, Dr. Yashar graduated Summa Cum Laude (3rd in class) in 1986 from Vanderbilt University with a B.A. degree in Biology. She received her M.D. from Northwestern University in 1991, and completed an internship and residency at the University of Michigan Department of Obstetrics and Gynecology in Ann Arbor, MI.

After a 2-year fellowship in Gynecologic Oncology at the University of Louisville, Dr. Yashar decided to enter the field of Radiation Oncology and completed her Radiation Oncology Residency at the University of Louisville. Prior to being recruited to the UCSD Department of Radiation Oncology in 2006, Dr. Yashar served as an Assistant Professor in the Department of Radiation Oncology at the University of Louisville.

Dr. Yashar’s clinical and research focus has centered on cancers in women, notably breast and gynecologic cancers. Her surgical training is invaluable particularly in the application of brachytherapy in both breast and gynecologic tumors. She currently serves as the Chief of the Gynecologic Cancer and Breast Cancer Services in the UCSD Department of Radiation Medicine and Applied Sciences.

Dr. Yashar has also been an invited lecturer at National Review Courses for Radiation Oncology, including the Osler Review Course. She has also been an invited speaker on Gynecologic Oncology issues at numerous national meetings including the Radiation Therapy Oncology Group (RTOG), the Gynecologic Oncology Group (GOG) and the American Brachytherapy Society (ABS). She is on the Editorial Board of the International Journal of Radiation Oncology Biology and Physics and an editor of the textbook Principles and Practice of Gynecologic Oncology.

Outside the hospital, Dr. Yashar is a devoted mother of 3 sons, Will, Jake and Drew. Her husband, Arnie, is a local Orthopedic Surgeon at Kaiser Permanente.

Original Publications
Book Chapters
Manuscripts Under Preparation

Original Publications

  1. Pearl ML, Yashar CM, Johnston CM, Reynolds RK, Roberts JA. Exponential regression of CA 125 during salvage treatment of ovarian cancer with taxol. Gyn Onc 1994;53(3):339-343.
  2. Pearlman MD, Yashar CM, Ernst S, Solomon W. An incremental dosing protocol for women with severe vaginal trichomoniasis and adverse reactions to metronidazole. Am J Obstet Gynecol 1996;174(3):934-936.
  3. Shields LB, Gercel-Taylor C, Yashar CM, Wan TC, Katsanis WA, Spinnato JA, Taylor DD. Induction of immune responses to ovarian tumor antigens by multiparity. J Soc Gynecol Investig 1997;4(6):298-304.
  4. Yashar CM, Taylor DD, Gercel-Taylor C. Lymophokine-activated killer (LAK)-mediated lysis of sequentially isolated ovarian cancer cell lines. Am J Reprod Immunol. 1997;38(6):431-437.
  5. Yashar CM, Gercel-Taylor C, Gibb RK, Weeks JW, Taylor DD. Identification of a unique form of p53 in human cord blood associated with the development of maternal autoantibodies. Am J Reprod Immun 1998;39(6):368-375.
  6. Jose BO, Koerner P, Bertolone S, Patel CC, Spanos WJ, Paris KJ, Silverman CL, Yashar CM. Pediatric Hodgkin’s Disease. J Kentucky Med Ass 2004;102(3):104-107.
  7. Jose BO, Koerner P, Spanos WJ Jr, Paris KJ, Silverman CL, Yashar CM, Carrascosa LB. Hodgkin's lymphoma in adults--clinical features. J Ky Med Assoc. 2005 Jan;103(1):15-17.
  8. Saxena, A, Yashar CM, Taylor DD, Gercel-Taylor C. Cellular response to chemotherapy and radiation in cervical cancer. Am J of Obstet and Gynecol 2005;192(5): 1399-1403.
  9. Yashar CM, Spanos WJ, Taylor DD, Gercel-Taylor C. Potentiation of the radiation effect with genistein in cervical cancer cells. Gyn Onc 2005 Oct;99(1):199-205. (view article)
  10. Minor GI, Yashar CM, Spanos WJ, Jose BO, Silverman CL, Carrascosa LA, Farmer M, Paris, KJ. The relationship of radiation pneumonitis and treated lung volume in breast conservation therapy. The Breast J 2006;12(1): 48-52.

Book Chapters

  1. Yashar, CM. Bleeding in the First Twenty Weeks of Pregnancy, in Emergency Care of the Woman, Pearlman M., Tintinalli J. (eds). McGraw-Hill Company, 1998:29-37.
  2. Yashar, CM. Basic Principles in Gynecologic Radiotherapy to be in 7th Edition of Clinical Gynecologic Oncology, DiSaia Philip J., Creasman William T. (eds). Mosby

Manuscripts Under Preparation

  1. Patel J, Silverman CL, Carrascose L, Malkani A, Spanos WJ, Paris KJ, Jose BO, Yashar CM. Evaluation of Scrotal and Testicular dose when using Radiation for Heterotopic Ossification Prophylaxis (submitted, 4/06 The American Journal of Orthopaedics).
  2. Carrascosa LA, Paris KJ, Yashar CM, Larocca R, Faught R, Wilson L, Spanos WJ. Addition of Paclitaxel to RTOG 85-02 accelerated split course radiation for palliation of advanced pelvic and head and neck malignancies. (submitted 6/06 Southern Medical Journal).
  3. Turina M, Mulhall BA, Mahid SS, Yashar CM, Galandiuk S. the frequency and surgical Management of Chronic Complications Related to Pelvic Radiation. (submitted to “Archives of Surgery 6/06).
  4. Guarneschelli J, Spanos WJ, Yashar CM, Brock G, Jose BO. High-dose-rate endobronchial brachytherapy palliates symptoms due to endobronchial tumors: The 10-year James Graham Brown Cancer Center Experience. Work in progress.
  5. Boyd J, Wilson L, Spanos W, Yashar CM. Hi-art Tomotherapy Megavoltage CT-Based Cumulative Dose-Volume-Histograms and Isodose Curve Plans for Low-Dose-Rate Brachtherapy of Cervical Cancer. Work in progress.
  6. Phan C, Paris K, Jose OB, Spanos WJ, Yashar CM, Carascosa L, Suarez C, Silverman C. Tolerance and Practicality of Using Amifostine During Radiation of Pediatric Patients to Reduce Long-Term Side Effects and Second Malignancies, to be submitted.
  7. Owens K, Spanos WJ, Carrascosa L, Yashar CM. One centimeter vaginal cuff brachytherapy – equivalency to entire vaginal length. Work in progress.


  1. Nguyen PK, Montgomery C. Bockenstedt PL. Partial localization of the site of factor XIIIa crosslink of putrescine into von Willebrand’s factor. Blood 1989 Vol 74:950A.
  2. Yashar CM, Gercel-Taylor C, Hilgers RD, Taylor DD. The effect of parity on the presence of p53 autoantibodies. J Soc Gyn Invest 1997 Vol 4(1) Suppl., Abstract #591.
  3. Yashar CM, Taylor DD, Hilgers RD, Gercel-Taylor C. Changes in the sensitivity of tumor cells to LAK-mediated lysis during progression of ovarian cancer. J Soc Gyn Invest 1997 Vol 4(1) Suppl., Abstract #579.
  4. Yashar CM, Gercel-Taylor C, Taylor DD. Detection of antibodies against wild-type and mutant p53 in the sera of ovarian cancer patients. Gyn Onc 1997:64(2):332, Abstract #166.
  5. Metzinger D, Gibb RK, O’Connor D, Yashar CM, Taylor DD, Gercel-Taylor C. Expression of p53, bcl-2, bax, and WAF-1 Stage IIIc ovarian carcinoma. Gyn Onc 1997 Vol 64(2):331, Abstract #164.
  6. Mahid SS, Turina M, Yashar CM, Galandiuk S. Radiation-induced complications requiring surgical treatment. JCO 23(16S):794s, Abstract # 8266, 2005.
  7. Wilson D, Hughes S, Yashar CM. Tomotherapy Megavoltage Imaging for Gynecological Brachytherapy Treatment Planning and IMRT Integration, Medical Physics 32(6):1951, 2005.
  8. Patel H, Silverman C, Spanos WJ, Yashar CM. Evaluation of Scrotal and Testicular Dose when using Radiation for Heterotopic Ossification Prophylaxis. Proceedings of the American Society of Therapeutic Radiation Oncology 47th Annual Meeting 63(2) Supplement 1, October, 2005.
  9. Boyd J, Wilson L, Spanos W, Yashar CM. Hi-art Tomotherapy Megavoltage Ct-Based Cumulative Dose-Volume-Histograms and Isodose Curve Plans for Low-Dose-Rate Brachtherapy of Cervical Cancer. Brachytherapy Volume 5, Issue 2, April-June, pp101, 2006.