Department of Radiation Oncology


K.S. Clifford Chao, M.D.

K.S. Clifford Chao, M.D.
Chu H. Chang Distinguished Professor and Chair, Department of Radiation Oncology
Columbia University College of Physicians and Surgeons

Professor and Chief, Division of Radiation Oncology
Weill Cornell College of Medicine

Director, Residency Program
NewYork Presbyterian Hospital (Columbia Campus)

Areas of Expertise:
Head and Neck Cancers
Breast Cancer
Prostate Cancer
Gastrointestinal Cancer
Brain Cancer
Esophageal Cancer
Pancreatic Cancer


Medical School   Kaohsiung Medical College (Taiwan)
Internship   St. Luke’s Hospital
Residency   Mallinckrodt Radiation Institute/Washington University
Board Certification   Radiation Oncology
Former Affiliationn(s)   Professor, Department of Radiation Oncology, the University of Texas M. D. Anderson Cancer Center, Houston, TX, August 2007 to April 2008
Associate Professor, Department of Radiation Oncology, the University of Texas M. D. Anderson Cancer Center, Houston, TX, June 2002 – July 2007

Primary Practice Location:

New York Presbyterian Hospital and Columbia University Medical Center (NYP-CUMC)
Department of Radiation Oncology
622 West 168th Street
New York, NY 10032

Phone: (212) 305-5050
Fax: (212) 305-5935

Recent Publications:

Yang YC, Chao KS, Lin CP, Chen YY, Wang KL, Chen YJ. Oxaliplatin regulates DNA repair responding to ionizing radiation and enhances radiosensitivity of human cervical cancer cells. Int J Gynecol Cancer 2009;19(4):782-6

Chen YJ, Chao KSC, Yang YC, Hsu ML, Lin CP, Chen YY. Zoledronic acid, an aminobisphosphonate, modulates differentiation and maturation of human dendritic cells. Immunopharmacol and Immunotoxicol 2009;31(3): 499–508

Deasy JO, Moiseenko V, Marks L, Chao KS, Nam J, Eisbruch A. Radiotherapy dose-volume effects on salivary gland function. Int J Radiat Oncol Biol Phys. 2010 Mar 1;76(3 Suppl):S58-63. Review

Wernicke AG, Parashar B, Kulidzhanov F, Riley L., Christos PJ, Fischer A, Nori D, Chao KS. Prospective study validating inter- and intraobserver variability of tissue compliance meter in breast tissue of healthy volunteers: Potential implications for patients with radiation-induced fibrosis of the breast. Int J Radiat Oncol Biol Phys. 2010 Apr 13 [Epub ahead of print]

Parashar B, Edwards A, Mehta, R, Pasmantier M, Wernicke AG, Sabbas A, Kerestez RS, Nori D, Chao KS. Chemotherapy significantly increases the risk of radiation pneumonitis in radiation therapy of advanced lung cancer. Am J Clin Oncol. 2010 May 21 [Epub ahead of print]

McGovern SL, Williams MD, Weber RS, Sabichi A, Chambers MS, Martin JW, Chao KSC. Three synchronous HPV-associated squamous cell carcinomas of Waldeyer's ring: Case report and comparison with Slaughter's model of field cancerization. Head Neck. 2010 Aug;32(8):1118-24

Wernicke AG, Goodman RL, Turner BC, Komarnicky LT, Curran WJ, Christos PJ, Khan I, Vandris K, Parashar B, Nori D, Chao KS. A 10-year follow-up of treatment outcomes in patients with early stage breast cancer and clinically negative axillary nodes treated with tangential breast irradiation following sentinel lymph node dissection or axillary clearance. Breast Cancer Res Treat. 2010 Sept 19 [Epub ahead of print]

Moeller BJ, Rana V, Cannon BA, Williams MD, Sturgis EM, Ginsberg LE, Macapinlac HA, Lee JJ, Ang KK, Chao KS, Chronowski GM, Frank SF, Morrison WH, Rosenthal DI, Weber RS, Garden AS, Lippman SM, Schwartz DL. Prospective imaging assessment of mortality risk after head-and-neck radiotherapy. Int J Radiat Oncol Biol Phys. 2010 Nov 1;78(3):667-74

Parashar B, Patel P, Monni S, Singh P, Sood N, Trichter S, Sabbas A, Wernicke AG, Nori D, Chao KS. Limited resection followed by intraoperative seed implantation is comparable to stereotactic body radiotherapy for solitary lung cancer. Cancer. 2010 Nov 1;116(21):5047-53

Frank SJ, Rosenthal DI, Petsuksiri J, Ang KK, Morrison WH, Weber RS, Glisson BS, Chao KS, Schwartz DL, Chronowski GM, El-Naggar AK, Garden AS. Intensity-modulated radiotherapy for cervical node squamous cell carcinoma metastases from unknown head-and-neck primary site: M.D. Anderson Cancer Center outcomes and patterns of failure. Int J Radiat Oncol Biol Phys 2010 Nov 15;78(4):1005-10


  • Residency/Medical Education
  • Advanced Technology
  • Patients
  • CUMC Scene