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The multidisciplinary care team for CyberKnife® of Texas in Tyler includes specialists and support personnel who are skilled and highly trained.
Our team includes:
Surgeons Neurosurgeons
Tyler Neurosurgical Associates
Thoracic Surgeons
- John S. Clarke, MD
- Thomas McGovern, MD
General Surgeons
Radiation Oncologists
Team Members
Bios
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Dr. Jon Ledlie trained at the University of South Carolina at Charleston. He is board certified. His areas of interest include minimally invasive and complex spinal surgery, vertebral body compression fractures and CyberKnife® stereotactic radiosurgery.
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Dr. Thomas Grahm completed fellowships
in vascular/skull base surgery at Barrow Neurological Institute. He is board certified. His areas of interest include aneurysms, arteriovenous malformations, skull base tumors, CyberKnife® stereotactic radiosurgery, and spinal surgery.
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Dr. Mark Renfro trained at the University of Florida. He is board certified. His areas of interest are cerebrovascular disease, skull base tumors, CyberKnife® stereotactic radiosurgery, deep brain stimulation, and complex spinal surgery.
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Dr. Paul Detwiler trained at Barrow Neurological Institute with fellowships in spine surgery and cerebrovascular and skull base tumor surgery. He is board certified. His clinical interests include aneurysms, arteriovenous malformations, CyberKnife® stereotactic radiosurgery, skull base tumors, and spinal surgery.
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Dr. Brian E. Snell completed a fellowship in complex spinal surgery at the Medical College of Wisconsin. He is board eligible. His areas of interest include aneurysms, arteriovenous malformations, deep brain stimulation, minimally invasive and
complex spinal surgery, and CyberKnife® stereotactic radiosurgery.
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Dr. J. Stuart Crutchfield earned his medical degree with honors at Baylor College of Medicine. His internship and neurosurgery fellowship were also at Baylor. He is board certified by the American Board of Neurological Surgery. His memberships include American Medical Association, American Association of Neurological Surgeons, American Board of Neurological Surgery, American College of Surgeons, Congress of Neurological Surgeons, the Texas Medical Association and Smith County Medical Society.
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Dr. Mauricio Giraldo completed medical school at Javeriana University School of Medicine. Dr. Giraldo was an Instructor of Surgery at Harvard Medical School. He has won many awards and is a member of the Society of Laparoendoscopic Surgeons. |
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Dr. James D. Kolker is medical director of the ETMC Cancer Institute. He earned his medical degree at Thomas Jefferson Medical College, Jefferson Medical School. He completed his internship at Roger Williams General Hospital (Brown University) where he also completed residency programs in internal medicine. His radiation oncology residency was at the University of Chicago/Michael Reese, Department of Radiation and Cellular Oncology. Dr. Kolker is board certified by the American Board of Radiology (Therapeutic) and the American Board of Internal Medicine. |
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Dr. Heidi L. McKellar is a radiation oncologist with the ETMC Cancer Institute. She earned her medical degree from University of Texas Health Science Center. Her residency was at University of TexasMD Anderson Center and her internship in internal medicine was at University of Texas, Houston. She is board certified by the American Board of Radiology in radiation oncology. She was a professor at Stanford University Medical Center, Department of Radiation Oncology and performed a locum tenens at Washington-Stanford Radiation Oncology as a clinical assistant.
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Lee Fite, RT (R)(T) has 21 years radiation therapy experience at the ETMC Cancer Institute. She holds a masters in communication. She has been supervisor of treatment services at the ETMC Cancer Institute for 10 years.
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Mary L. Bonham, RT (R)(T) is a radiation therapist/CyberKnife® therapist. She received a B.S. in education from the University of Wisconsin, LaCrosse, WI. She holds an associate of applie science (radiologic technology) degree from Angelina College, Lufkin. She additionally studied Radiation Therapy at U.T.MD Anderson, Houston. She has worked at Nacogdoches Medical Center and served at staff radiation therapist at Texoma Medical Center, Denison, TX, and ETMC Cancer Institute.
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Misty Weathers, RN, BSN earned her BSN from University of Texas at Tyler in 1998. She worked as a registered nurse in ETMC's neuro ICU for eight years before becoming CyberKnife® coordinator.
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Russell Tarver MS, DABR. After graduating with an undergraduate degree in applied physics Russell trained and received his master's degree in medical physics from the University of Texas atMD Anderson Cancer Center. He has 10 years of experience as a radiation therapy physicist and is certified by the American Board of Radiology and licensed by the state of Texas. He is also a member of the American Association of Physicists in Medicine (MPM), and an officer and member of the Southwest Chapter of the MPM (SWMPM). Additionally, he is a member of American Society for Therapeutic Radiology and Oncology (ASTRO) as well as the CyberKnife® Society where he serves on the Patient Registry Advisory Board. |
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Pushkar Desai, MS, CyberKnife® physicist has been working as a clinical medical physicist at ETMC since September 2006. He worked previously as a clinical medical physicist with a medical physics consulting group providing medical physics services to several hospitals in Oklahoma. He performed a clinical internship at William Beaumont Hospital, Royal Oak, MI. He completed a masters in medical physics at Wayne State University, Detroit USA (CAMPEP accredited Medical Physics Graduate program). He has published two CyberKnife® abstracts.
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Tracey Ferguson RT R(CT). Tracey studied at Baylor University and Tyler Junior College and holds an associates degree in Radiologic Science. She also holds certificates with the Texas Board of Health and the American Radiologic Technologists in Radiography and Computed Tomography. She has worked solely with oncology patients for 13 years, and has 15 years total experience as a tech. |
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Carla Stuart, RN, BSN, OCN, graduated from the University of Central Oklahoma in 1992. She has 15 years oncology experience, four of those in radiation oncology. She became OCN certified in 2002.
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Debbie O'Sullivan, RN, OCN, graduated from Tyler Junior College Associate Degree Nursing Program May 2003. She began working in oncology right out of nursing school on ETMC Tyler's 6-South. She served there from May 2003 to January 2005. She obtained her oncology certification in October 2004. From January 2005 to January of 2007, she worked in UT Health Center's outpatient oncology clinic where she provided chemotherapy. She has been working at the ETMC Cancer Institute as Dr. Kolker's nurse since January 2007.
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