Robert B. Ash, M.D.

(877) 460-4673
Robert B. Ash, M.D.
Radiation Oncologist
Clinical Expertise
  • Thoracic Cancers
  • Genitourinary Tumors
  • Intraoperative Radiotherapy for Breast Cancer
  • Stereotactic Radiosurgery
Academic Appointments
  • Assistant Clinical Professor, Department of Radiation Oncology
  • Medical Director of Radiation Oncology, St. Joseph of Orange
Robert Ash, M.D., brings more than two decades of radiation oncology experience to City of Hope. Throughout his career he has been top-rated for excellence in skill and interaction with his patients.

Highly trained in all aspects of radiation therapy, Dr. Ash specializes in complex procedures involving precision stereotactic radiosurgery for brain tumors, lung tumors and intraoperative radiation for breast cancer.

A native of Canada, Dr. Ash received his medical degree from Memorial University of Newfoundland and continued his training at University of Western Ontario and University of California San Francisco.

A strong believer in collaboration, Dr. Ash sees the role of the radiation oncologist as a key member of a total team dedicated to providing patients with the best possible care.

Location

Education & Experience

Degrees

  • 1995, M.D., Memorial University of Newfoundland, St. John’s,
    Newfoundland and Labrador, Canada

  • 1991, B.S., Memorial University of Newfoundland, St. John’s,
    Newfoundland and Labrador, Canada

  • 1990, B.M., Memorial University of Newfoundland, St. John’s,
    Newfoundland and Labrador, Canada

Fellowship

  • 2000, Postgraduate Training IMRT, University of California San Francisco, San Francisco, CA

Residency

  • 2000, Radiation Oncology Residency, University of Western Ontario, London, Ontario, Canada

Professional Experience

  • 2018-present, Assistant Clinical Professor, Department of Radiation Oncology, City of Hope, CA

  • 2007-present, Medical Director of Radiation Oncology and Radiation Oncologist, St. Joseph Hospital of Orange, Orange, CA

  • 2000-2007, Associate Professor, University of Western Ontario, London, Ontario

  • 2000-2007, Staff Radiation Oncologist, London Regional Cancer Centre, London, Ontario

  • 2001-2005, Director, Undergraduate Medical Education for Oncology, University of Western Ontario, London, Ontario

Awards & Memberships

Awards

  • 2006, Provincial Association of Interns and Residents of Ontario "Excellence in Clinical Teaching" award

  • 2003, "Best Curriculum on Earth" award for teaching excellence from Meds III, University of Western Ontario Trinity-Conception Regional Health Foundation

Memberships

  • College of Physicians and Surgeons of Ontario

  • Canadian Association of Radiation Oncologists

  • Canadian Medical Association

  • American Society of Therapeutic Radiology and Oncology

  • American College of Radiology

  • Royal College of Physicians and Surgeons and Canada

  • Ontario Medical Association

  • International Association for the Study of Lung Cancer

Publications

  • Williams VL, Bhandari T, Chen LJ, Wagman LD, Carpenter M, Harness JK, Khanijou R, Gobran M, Olaya W, Carandang MI, Ash RB. Recurrence rates for patients with early-stage breast cancer treated with IOERT at a community hospital per the ASTRO consensus statement for APBI. Brachytherapy. 2019 Sept-Oct;18(5):651-657. doi: 10.1016/j.brachy.2019.04.270. Epub 2019 Jun 22. PMID: 31235444 Clinical Trial.
  • Ash RB, Williams VL, Wagman LD, Forouzannia A. Oncology (Williston Park). Intraoperative radiotherapy for breast cancer: its perceived simplicity. 2013 Feb;27(2):107-13. PMID: 23530401 Free article. Review.
  • Forouzannia A, Harness JK, Carpenter MM, Ash RB, Williams V, Gonzalez MM, Fischer S, Rodriguez A, Wagman LD. Intraoperative electron radiotherapy boost as a component of adjuvant radiation for breast cancer in the community setting. Am Surg. 2012 Oct:78(10):1071-4. PMID: 23025943
  • Stein ME, Bernstein Z, Abacioglu U, Sengoz M, Miller RC, Meirovitz A, Zouhair A, Freixa SV, Poortmans PH, Ash R, Kuten A. Small Cell (Neuroendocrine) Carcinoma of the Prostate: Etiology, Diagnosis, Prognosis, and Therapeutic Implications – A Retrospective Study of 30 Patients from the Rare Cancer Network, The American Journal of The Medical Sciences, December 2008, Vol. 336, No. 6.
  • Yu E, Tai P, Younus J, Malthaner R, Truong P, Stitt L, Rodrigues G, Ash R, Dar R, Yaremko B, Tomiak A, Dingle B, Sanatani M, Vincent M, Kocha W, Fortin D, Inculet R. Postoperative extended-volume external-beam radiation therapy in high-risk esophageal cancer patients: a prospective experience. Curr Oncol. 2009 Aug;16(4):48-54.
  • Song WY, Chiu B, Bauman GS, Lock M, Rodrigues G, Ash R, et al. Prostate contouring uncertainty in mega-voltage computed tomography (MVCT) images acquired with a helical tomotherapy unit during image-guided radiation therapy (IGRT). IJRPO, 2006; Jun 1;65(2):595-607.
  • Passaperuma K, Ash R, Venkatesan V, et al. Pelvic chemoradiotherapy after chemotherapy for metastatic bladder cancer. The Canadian Journal of Urology; April 2006; 13(2);3009-3015.
  • Ash RB, Videtic G. Letter to the Editor:  Radiation Recall Dermatitis after the use of the Anorexiant Phentermine in a Patient with Breast Cancer. The Breast Journal, 2006; Vol. 12, No. 2, pp186-187.
  • Videtic G, Truong P, Ash R, et al. Does Sex Influence the Impact that Smoking, Treatment Interruption and Impaired Pulmonary Function have on Outcomes in Limited Stage Small Cell Lung Cancer Treatment? Can Respir J, 2005; Vol. 12, No 5, pp 245-250.
  • Videtic GM, Stitt LW, Ash RB, et al. Impaired diffusion capacity predicts for decreased treatment tolerance and survival in limited-stage small cell lung cancer patients treated with concurrent chemoradiation. 2004 Lung Cancer; 2004; 43: 159-166.
  • Rodrigues G, Chan A, Ash RB, et al. Prognosis of superior vena cava obstruction in lung cancer. Lung Cancer 2003; vol. 41: (supplement 2), p.S259.
  • Yu E, Dar, AR, Ash RB, et al. Is extended volume of external beam irradiation beneficial in post esophagectomy high risk patients receiving combined chemoradiation therapy?  Int J Radiat Oncol Biol Phys 2001; 50(5):#13 - p1384.