About Dr. Joshua Ellenhorn

Joshua D.I. Ellenhorn, MD is a leading expert in Surgical Oncology, specializing in the surgical treatment of cancer. He is Clinical Professor of Surgery at Cedars-Sinai Medical Center and Adjunct Professor at the John Wayne Cancer Center. A Senior Partner in the Surgery Group of Los Angeles, Dr. Ellenhorn is ranked by US News & World Report among the top 1% of Surgeons in the United States and ranked as a Super Doctor in Los Angeles.  He is  a medical educator, having trained over 60 surgical oncologists. A nationally recognized leader in surgery, surgical education, and cancer research, Dr. Ellenhorn is dedicated to providing the highest quality of surgical care with an emphasis on a personalized approach to the individual patient.

Dr. Ellenhorn practiced for over 18 years at the City of Hope National Medical Center and was Professor and Chief of the Division of General and Oncologic Surgery and was director of the nationally recognized Surgical Oncology Training Program. His many achievements include pioneering the use of minimally invasive and robotic techniques to treat gastrointestinal malignancies. He has been in the forefront of breast cancer treatment, promoting highly innovative techniques such as intraoperative radiation therapy and skin and nipple sparing techniques for breast cancer treatment. In addition to his clinical and educational work, Dr. Ellenhorn directed an active research laboratory. His laboratory worked to develop new cancer vaccines that can stimulate the immune system to identify and eliminate cancer cells.

Dr. Ellenhorn received numerous citations for his work, including fellowship awards from the National Institutes of Health and from the American Cancer Society. He published more than 100 book chapters, abstracts and articles in peer-reviewed journals, and lectured at dozens of medical conferences worldwide. He is a member of the editorial boards of a number of oncologic and surgical journals and has been a member of a number of national panels defining guidelines for state of the art cancer care. He has been a member of the National Institutes of Health Clinical Oncology Study Section which makes decisions about future clinical cancer trials throughout the United States. View a complete listing of Doctor Ellenhorn’s Publications »

Dr. Ellenhorn received his medical degree from Boston University School of Medicine and completed his residency training at the University of Cincinnati Hospital. He performed research fellowship training for two years in immunology at the University of Chicago and completed a two-year Surgical Oncology fellowship at the prestigious Memorial Sloan-Kettering Cancer Center in New York. View complete details on Doctor Ellenhorn’s Education »

What is Surgical Oncology?

Surgical oncology is a specialty that focuses on the surgical treatment of a variety of tumors, the most common being breast cancer, colorectal cancer, pancreatic and gastric cancer, liver tumors, melanoma, and endocrine tumors. Surgical oncology requires a specialized two year training program after a general surgery residency. Currently training comes from programs approved by the Society of Surgical Oncology (SSO). Dr. Ellenhorn graduated from the prestigious SSO-certified Surgical Oncology Training Program at Memorial Sloan-Kettering Cancer Center MSKCC.org and he directed the SSO-certified Surgical Oncology Training Program at City of Hope for 10 years. mskcc.org. The American Board of Surgery (ABS) has received approval to offer a new subspecialty certificate in complex general surgical oncology. Learn more about surgical oncology »

Recent Instructional Videos

Laparoscopic Resection of a Gastric GIST

Dr. Ellenhorn on the Doctor's Show

Intraoperative Radiation Therapy for Breast Cancer: Case Demonstration

Intraoperative Radiation Therapy for Breast Cancer

Laparoscopic and Robotic Total Gastrectomy for Stomach Cancer

Laparoscopic and Robotic Distal Gastrectomy for Cancer

Laparoscopic Subtotal Gastrectomy and D2 Lymphadenectomy for Cancer




Dr. Ellenhorn’s Recent Publications

2012.Oxner CR, Vora L, Yim J, Kruper L, Ellenhorn JDI. Magnetic resonance imaging-guided breast biopsy in lesions not visualized by mammogram or ultrasound. American Surgeon 2012 78:1087-1090 2012.Learn More »
2012.Arrington AK, Nelson R, Chen SL, Ellenhorn JDI, Garcia-Aguilar J, Kim J. The Evolution of Surgical Technique for Total Gastrectomy Over a 12-Year Period: A Single Institution's Experience. American Surgeon 2012 78:1054-1058 2012.Learn More »
2012. Blache CA, Manuel ER, Kaltcheva TI, Wong AN, Ellenhorn JDI, Blazar BR, Diamond DJ. Systemic Delivery of Salmonella Typhimurium Transformed with IDO shRNA Enhances Intratumoral Vector Colonization and Suppresses Tumor Growth. Cancer Res. 72:6447-6456 2012.Learn More »
2013.Aronowitz JA, Ellenhorn JDI. Adipose Stromal Vascular Fraction Isolation: A Head-to-Head Comparison of Four Commercial Cell Separation Systems. Plast Reconstr Surg. 132:932-939 2013.Learn More »
2013.Ellenhorn JDI. When it comes to the efficacy of metastasectomy, biology is king. Oncology (Williston Park). 27:1051, 2013.Learn More »