RADIATION THERAPY IN 2018 AND BEYOND. Rex Hoffman, MD Providence Saint Josephs Medical Center Disney Family Cancer Center Burbank, CA
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1 RADIATION THERAPY IN 2018 AND BEYOND Rex Hoffman, MD Providence Saint Josephs Medical Center Disney Family Cancer Center Burbank, CA
2 RADIATION THERAPY IN 2018 AND BEYOND I. Introduction II. III. IV. History Current Indications I. Cancer II. Benign Multidisciplinary Approach V. Side Effects (and Management) VI. Beyond 2018
3 RADIATION THERAPY IN 2018 AND BEYOND Introduction Focal Therapy Teletherapy : comes in from outside at a distance. Brachytherapy: inside cavity (intra-cavitary) or into tissue (interstitial). Radio-embolization Theraspheres/SirSpheres: blood vessels feeding liver. Liquid Radiation Zevallin : Lymphoma. Xofigo: Prostate Cancer.
4 RADIATION THERAPY IN 2018 AND BEYOIND History 1895: Roentgen discovered X-ray. 1890s: Tuberculosis, Lupus (picture) and Cancer. Curies. 1901: Francis Williams: Roentgen Rays in Medicine and Surgery. Early 1900s: Flouroscopy and Death of Mihran Kassabian, MD 1916: American Radium Society formed. Stanley Kaplan at Stanford. Gilbert Fletcher at MD Anderson.
5 1890S: X-RAY & RADIATION THERAPY German Physicist: William Roentgen. Film of Bertha Roentgen s hand. Birth of X-ray 1896: JAMA: There will doubtless be an extensive advertisement of cathode ray baths, X-ray treatments, etc., but it is to be hoped that any active exploitations of these will, until the matter is more elucidated by accurate scientific researches, be confined to the irregulars who have no standing in the regular medical profession.
6
7 1950S: COBALT AT MD ANDERSON Cobalt Units Very superficial Woman with abdominal tumor MD Anderson
8 RADIATION THERAPY 1950S 12 Pages on the Newest Methods to Save You From Malignancies Already saving one victim in three, science forges stupendous arsenal of new weapons. To multiply cancer cures, gigantic radiation machines like that pictured here are just getting into general use. The U.S. has thrown $25 million into a scientific dragnet to test out 40,000 chemicals, gambling heavily that among them they will be able to discover some new drug cures. Conclusion: Cancer on the Brink!
9 1950S AND 1960S VARIAN First Model of Linear Accelerator Opening 1 shape. Could not change shope Could rotate around patient
10 1960S AND 1970S Varian Manipulate beam of beam of radiation from different directions. High energy Multi-leaf collimator Teletherapy
11 LINEAR ACCELERATOR TODAY
12 LINEAR ACCELERATOR BASED SRS
13 GAMMA KNIFE Stereotactic radiosurgery 201 cobalt beams converge Brain tumors Arteriovenous malformation
14 BRACHYTHERAPY Place sources of radiation directly in or immediately adjacent to tumors. 1890s and early 1900s. Gynecologic tumors Prostate cancer Breast cancer Sarcomas
15 RADIATION THERAPY IN 2018 Goal: Treat tumor and spare normal tissues. Teletherapy: Stereotactic Radiosurgery (SRS) 1 fraction. Stereotactic Body Radiation Therapy (SBRT) 2-5 fractions Intensity modulated radiation therapy (IMRT). Image Guided radiation therapy (IGRT). Lung Prostate Volumetric modulated radiation therapy (VMAT)
16 IMAGE GUIDED RADIATION THERAPY
17 RADIATION THERAPY IN 2018 Brachytherapy Gynecologic cervix, uterine and vaginal cancers. Prostate Breast Mammosite. Place source in breast. Head and Neck (ie. oral tongue.) Sarcomas
18 OTHER FORMS OF RADIOTHERAPY Radio-embolization (Theraspheres and Sir-Spheres) Uses tiny glass beads, called microspheres, to deliver radiation directly to cancerous tumors in the liver. Catheter into hepatic artery, the liver s main blood vessel. Once in place, microspheres are inserted into the catheter and enter the smaller blood vessels supplying the tumor and block the flow of blood. Then, the microspheres emit radiation to destroy cancer cells in the tumor, while sparing normal tissue.
19 OTHER FORMS OF RADIOTHERAPY Liquid Radiation Zevalin and Bexxar Zevalin and Bexxar use an anti CD-20 monoclonal antibody to target and destroy the normal and cancerous lymphocytes. Then emit radiation to zap nearby cells and thereby increase the destruction of the lymphoma cells. The beta emissions from the Yttrium-90 have a path length of about 5mm. This is longer than the 1mm path length of the Iodine-131 used with Bexxar. Luthathera Xofigo On January 26, 2018, FDA approved lutetium Lu 177 dotatate (LUTATHERA,) radiolabeled somatostatin analog, for treatment of somatostatin receptorpositive gastroenteropancreatic neuroendocrine tumors (GEP-NETs), including foregut, midgut, and hindgut neuroendocrine tumors in adults. Radioactive drug used to treat hormone-refractory prostate cancer that has spread (metastasized) to the bones. Attaches to bone and emits radiation.
20 RADIATION THERAPY IN 2018 Number of treatments: Teletherapy Standard: fractions for most cancers. Stereotactic Radiosurgery : 1 fraction. Stereotactic Body Radiation Therapy: 3-5 fractions. Hypo-fractionated Radiation Therapy: 5-21 fractions. Palliative for metastases: 5-10 fractions. Sometimes even 1 fraction. Breast: Down from 33 fractions to 21 fractions. (from Canada). Brachytherapy Gynecologic 3 5 fractions. Prostate - interstitial seeds: 1 fraction. Interstitial implant: 3-5 fractions. Breast 10 fractions over 5 days.
21 CURRENT INDICATIONS Cancer Brain Head and Neck - # 4 tongue or pharyngeal Thorax (lung, esophagus) - #5 lung Breast - #1 breast Abdomen (stomach, bowel, pancreas, kidney) Pelvis (Male and Female) - #3 prostate Extremity sarcomas Skin - #2 skin
22 CURRENT INDICATIONS IN 2018 Benign Arteriovenous malformations Pituitary Adenomas Meningiomas Acoustic Neuromas Pterygium
23 RADIATION THERAPY IN 2018 Multidisciplinary Approach: Work closely with surgeons and medical oncologists. Radiotherapy options: Pre-operative ie. Sarcoma. Concurrent with systemic therapy ie. Head/Neck and Lung Cancer. Consolidative ie. Lymphoma. Prophylactic- ie. Small Cell Lung Cancer to brain. Discuss prospectively at tumor conferences: Brain, Head & Neck, Lung, Gastrointestinal, Gynecologic, Breast and General Tumor Board (Just in Time)
24 SIDE EFFECTS ACUTE (Up to first 2 weeks after completion): Brain headaches or seizures Decadron and Keppra. Head and Neck mucositis, dry mouth, loss of taste. Lung cough, blood tinged sputum. Esophagus odynophagia, dehydration, weight loss. Stomach nausea. Colorectal diarrhea and abdominal cramping. Prostate increased hesitancy, burning with urination. Skin redness and desquamation.
25 SIDE EFFECTS Long Term (2+ weeks out and beyond): Brain Radiation necrosis. Head and Neck dry mouth and altered taste. Breast hypopigmentation. Lung radiation pneumonitis/pulmonary fibrosis. Esophagus dysphagia. Bowel chronic diarrhea. Skin hypopigmentation.
26 RADIATION THERAPY BEYOND 2018?
27 RADIATION THERAPY BEYOND : Everything that can be invented has been invented." Charles H. Duell, U.S. Commissioner of Patents.
28 RADIATION THERAPY BEYOND : 640,000 bytes of memory ought to be enough for anybody. Bill Gates
29 RADIATION THERAPY BEYOND 2018 Protons Bragg peak. More indications: pediatrics and cordomas. MRI Linear Accelerators MRI solves both of the primary issues with CBCT poor soft tissue contrast and difficulty capturing moving organs while delivering no extra radiation dose to the patient. Th Cancers often difficult to capture due to continuous motion from breathing or swallowing. MRI counteracts this challenge through respiratory gating, continuously monitoring the breathing cycle and taking the image at the optimal point in the cycle. Continued push towards Hypo-fractionation. Radio-immunotherapy Luthera, Xofigo, etc. Clinical Trials.
30 RADIATION THERAPY IN 2018 AND BEYOND Thank you
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