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Meet Our Team

Nicole Fleming, M.D.Nicole Fleming, M.D.
Medical Director
Assistant Professor, Gynecologic Oncology

Dr. Fleming has returned to the Houston area after completing her residency training in Obstetrics and Gynecology at Duke University Medical Center and fellowship in Gynecologic Oncology at University of California at Los Angeles Medical Center. Dr. Fleming has a special interest in minimally invasive surgery, including robotic-assisted laparoscopy, for appropriate patients with cervical, endometrial, and early-stage ovarian cancers. In addition to providing excellent patient care, Dr. Fleming continues to pursue her research interests, including surgical innovation and outcomes in gynecologic malignancies, and personalized treatment options for patients with ovarian and endometrial cancer. She is principal investigator and collaborator on multiple clinical trials involving surgery and chemotherapy to treat gynecologic malignancies. She has authored and co-authored numerous articles in peer-reviewed journals on these and other subjects. In addition, she has been invited to write book chapters on a variety of topics in gynecologic oncology.

Dr. Fleming is a member of the American College of Obstetricians and Gynecologists, the American Society of Clinical Oncology, Society of Gynecologic Oncologists, and American Association of Gynecologic Laparoscopists. In addition, she serves as reviewer for several journals including Gynecologic Oncology and Annals of Surgical Oncology.

Surgical Oncologists

Mara Antonoff, MDMara Antonoff, M.D. 
Instructor, Thoracic & Cardiovascular Surgery

Dr. Antonoff completed her residency in General Surgery at the University of Minnesota, in Minneapolis, where she completed 3 years of dedicated research time, including basic science benchwork examining the roles of heat shock proteins in cancer proliferation. She also focused on research in the areas of thoracic surgical clinical outcomes and surgical education, while completing the Association for Surgical Education’s Surgical Education Research Fellowship. Following her residency, Dr. Antonoff completed a fellowship in Cardiothoracic Surgery at the Washington University School of Medicine in St Louis, with a clinical focus in the General Thoracic track. She joined MD Anderson’s Department of Thoracic and Cardiovascular Surgery in 2014 as Clinical Instructor, and became Assistant Professor in 2015. Dr. Antonoff is board-eligible for the American Board of Thoracic Surgery, having trained in all aspects of cardiothoracic disease, with special concentration on thoracic oncology, lung transplantation, and diseases of the foregut, and an emphasis on minimally invasive surgical therapies. Dr. Antonoff’s clinical research interests focus on lung cancer, with particular interest in exploring the impact of gender on lung cancer prognosisand therapy.

Craig Messick, MD Craig Messick, M.D.
Assistant Professor, Colorectal Surgery

Dr. Messick graduated from The University of Texas Medical School in Houston. Following graduation, he completed his general surgery residency at Case Western Reserve University, Case Medical Center in Cleveland, followed by a fellowship in colon and rectal surgery at the Cleveland Clinic Foundation. He has received several honors and awards, including being named as, the Dudley P. Allen, MD, Scholar while at Case Western Reserve University, and the Sanford R. Weiss, MD, Scholar while at the Cleveland Clinic. He was presented the Harry E. Bacon, MD, Foundation Award, for his presentation at the 2009 American Society of Colorectal Surgeons (ASCRS) annual national meeting. Dr. Messick performs both traditional open and minimally invasive (laparoscopic) surgical techniques, and his clinical interests include malignant and benign diseases of the colon, rectum and anus, inherited cancer syndromes, inflammatory bowel disease, diverticulitis, perianal disease and other less frequent diseases.


John Papadopoulos, M.D.John Papadopoulos, M.D.
Assistant Professor, Urology

Dr. Papadopoulos is a fellowship trained urologic oncologist and certified urologist by the American Board of Urology. He completed his medical degree at the Texas Tech University School of Medicine and then went on to complete an internship in general surgery and residency training in urology at the University of Wisconsin in Madison. In 2007, he came to MD Anderson where he completed two years of fellowship training in urologic oncology and robotic surgery. Dr. Papadopoulos is a collaborator in multiple clinical trials involving high risk prostate cancer as well as active surveillance for low risk prostate cancer. He is currently the director of urologic oncology at the MD Anderson Regional Care Centers in Katy and Sugar Land where he treats patients with bladder, prostate and kidney cancer.


Michelle Shen, MDMichelle Shen, M.D. 
Assistant Professor, Surgical Oncology

Dr. Shen earned her medical degree at the University of Texas Health Science Center in San Antonio, and completed her residency in general surgery at the University of Texas at Houston where she was awarded resident of the year. Following her residency, Dr. Shen completed a fellowship in breast surgical oncology at MD Anderson Cancer Center. She is a member of the Texas Medical Association and the American College of Surgeons.
Additional Languages Spoken: Mandarin



Mark Zafereo, M.D.
Assistant Professor, Head and Neck Surgical Oncology

Dr. Zafereo specializes in treating tumors and cancers of the head and neck. He received his medical degree from The University of Texas Medical School at Houston and completed his otolaryngology-head and neck surgery residency at Baylor College of Medicine, followed by a fellowship in head and neck surgical oncology at MD Anderson. Dr. Zafereo is board certified by the American Board of Otolaryngology-Head and Neck Surgery. His clinical interests include head and neck cancer, salivary gland tumors, melanoma, thyroid and parathyroid.

Medical Oncologists

Mark Lewis, MDMark A. Lewis, M.D.
Assistant Professor, General Oncology

Dr. Lewis received his medical degree from Baylor College of Medicine with High Honor, where he also completed his residency and chief residency in Internal Medicine. Dr. Lewis completed a fellowship in Hematology/Oncology at the Mayo Clinic in Rochester, Minnesota, where he was chief fellow, prior to returning to Houston for his current role with MD Anderson. He is board certified by the American Board of Internal Medicine in both hematology and medical oncology. Dr. Lewis has received numerous honors, awards and accolades in his career, and has published over 15 articles in peer-reviewed journals on a number of cancer-related topics. As a general hematologist and medical oncologist, his clinical interests include breast, colon, head & neck, and lung cancers, as well as cancers running in families. His primary research interest is gastrointestinal oncology. His philosophy of care is, “There is no textbook approach to cancer. Every patient has their own story; I aim to understand them on an individual level so that I can personalize their care in every respect.”


Sadia Saleem, MDSadia Saleem, M.D.
Assistant Professor, Breast Medical Oncology

Dr Sadia Saleem completed her residency training in internal medicine at Baylor College of Medicine in Houston TX.  She then completed fellowship in Hematology and Oncology at the University of Texas Southwestern in Dallas Texas. She is board certified in both hematology and oncology. She then joined MD Anderson cancer center as faculty. She sees General Oncology, benign and malignant hematology patients and has a special interest in Breast Cancer. She is a member of the American Society of Clinical Oncology and has presented posters at various national conferences. She is also co-author on several peer reviewed publications.
Additional languages spoken: Urdu and Hindi.

Dr. Janet Tu Janet Tu, M.D.
Assistant Professor, General Oncology

Dr. Tu received her medical degree from Baylor College of Medicine in Houston, where she also completed her training in internal medicine and hematology/medical oncology. She is board certified by the American Board of Internal Medicine in internal medicine, hematology and medical oncology. Dr. Tu’s clinical interests include both benign and malignant hematology along with a variety of solid tumors, with particular interests in breast, head and neck, lung and colon cancers.
Additional languages spoken: Chinese (Mandarin)



Shi-Ming Tu, MDShi-Ming Tu, M.D.
Professor, Department of Genitourinary Medical Oncology

Dr. Tu earned his medical degree from the Washington University in St. Louis, MO. He completed his residency in Internal Medicine at the University of Illinois Hospitals in Chicago, followed by a fellowship at the University of Texas, MD Anderson Cancer Center. He specializes in the treatment of prostate and testicular cancers. Dr. Tu has been recognized with several honors and awards, including the University Cancer Research Award and the Upjohn Research Award. He has written a book on the “Origin of Cancers: Clinical perspectives and Implications of a Stem-Cell Theory of Cancer.”

Radiation Oncologists

Dr. Isidora Arzu Isidora Arzu, M.D., Ph.D.
Associate Professor, Radiation Oncology

Dr. Arzu was born and raised in Belize and educated in the United States. She received her Ph.D. in organic chemistry from Rice University and her medical degree from The University of Texas Medical Branch in Galveston. She completed her training in general radiation oncology at MD Anderson Cancer Center. Her first two years in practice were spent specializing in breast cancer and lymphoma. Dr. Arzu has extensive experience using the latest radiation therapy technologies and currently treats all disease sites. Her clinical interests include community education, cancer prevention and screening. She is board certified by the American Board of Radiology.

Shalin Shah, M.D.Shalin Shah, M.D.
Assistant Professor, Radiation Oncology

Dr. Shah graduated from the Albert Einstein College of Medicine in New York with a special distinction for research in Radiation Oncology. He completed his residency in Radiation Oncology at Albert Einstein/Montefiore Hospitals, where he served as the Chief Resident during his final year. He then completed his clinical fellowship in Radiation Oncology at MD Anderson. Prior to practicing in the Sugar Land and Oak Bend centers, he treated patients as part of the multidisciplinary head and neck cancer team at MD Anderson, and was listed among America's top oncologists in 2009 by the Consumers' Research Council of America. Dr. Shah is board certified by the American Board of Radiology. He is interested in researching how diet, exercise, and other integrative medicine strategies can improve the cure rates and side effects of treatment in cancer patients. Dr. Shah serves on the Board of Directors of the Indian American Cancer Network (IACAN). 
Languages spoken: Gujarati, Hindi and Spanish


Saira George, MDSaira J. George, M.D.
Assistant Professor, Dermatology

Dr. George earned her medical degree with Honors from Baylor College of Medicine, where she also completed her internal medicine internship and dermatology residency.  After training, she practiced general dermatology in Houston and then Phoenix, Arizona before returning back to Texas to join the staff at MD Anderson.   Dr. George is board certified by the American Board of Dermatology.  She is also a member of the Phi Beta Kappa Honor Society, Alpha Omega Alpha Medical Honor Society, and the American Academy of Dermatology.   Her interests include general medical dermatology with a specific focus on early detection and treatment of skin cancers, dermoscopy of pigmented lesions, and skin manifestations of internal disease.

Pain Medicine

Mitchell Engle, MDMitchell Engle, M.D., Ph.D.
Assistant Professor, Pain Medicine

Dr. Engle earned his medical degree and a Ph.D. in Pharmacology from The University of Iowa Carver College of Medicine in 2007. His Ph.D. research examined the role of the spinal cord in the development of neuropathic pain. He completed a clinical internship at the Physicians Medical Center Carraway in Birmingham, Alabama, followed by a clinical residency in Anesthesiology at the University of Alabama-Birmingham. While at the University of Alabama-Birmingham he served as a chief resident. Dr. Engle completed a fellowship in Pain Medicine at MD Anderson Cancer Center. He is board certified by the American Board of Anesthesiology in both Anesthesiology and Pain Medicine. He is currently an assistant professor in the Department of Pain Medicine at MD Anderson Cancer Center.


Steven Weitzman, MDSteven Weitzman, M.D., F.A.C.E
Assistant Professor, Endocrine Neoplasia & Hormonal Disorders

Dr. Weitzman graduated from The University at Buffalo School of Medicine in NY. He then completed a residency in Internal Medicine at Albert Einstein/LIJ Medical Center and an additional year as Chief Resident. His fellowship training was at the Stony Brook School of Medicine. Upon completion of fellowship, he joined the faculty at Stony Brook as Assistant Professor and was recognized as a Top Doctor in the NY Metro Area by Castle Connolly. Dr. Weitzman later came to MD Anderson for uniquely comprehensive training in all aspects of Endocrine Neoplasia as the inaugural fellow in Oncologic Endocrinology. He is board certified in Endocrinology and belongs to the Endocrine Society, American Thyroid Association, and the American Association of Clinical Endocrinologists. He sees patients at the Texas Medical Center and in Sugar Land. His clinical interests include thyroid, parathyroid, adrenal, and pituitary.

Care Team

Care teams also consist of Advanced Practice Nurses and Physician Assistants, who collaborate with the patient and physicians to provide top-quality cancer treatment. Mid-level providers are an essential part of cancer care in Sugar Land.

Nurse Navigator

  • Lori Lord

Advanced Practice Nurses

  • Hai Hong Cai
  • Jaimy John
  • Laurie Hughes
  • Harolyn Wallace
  • Misty White

Physician Assistants

  • Liza George
  • Jennifer Lee
  • Jaime Szeto
  • Erin Tinnerman
  • Elizabeth Wolf

Make an Appointment

How to Find Us

Sugarland Building Exterior


MD Anderson in Sugar Land is located at 1327 Lake Pointe Parkway, on the campus of CHI St. Luke's Sugar Land Hospital. Free parking is available. 

© 2015 The University of Texas MD Anderson Cancer Center