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Radiation for head and neck cancer video

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Information about Radiation for head and neck cancer video
Health & Medicine

Published on March 19, 2013

Author: doctorbobm

Source: slideshare.net

Description

Radiation Treatment of Cancers in the Head and Neck
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Radiation for Head & Neck Cancer Robert Miller MD www.aboutcancer.com

NCCN.org

Treatment decisions and management should be made by a team of physicians• Experienced cancer Surgeon and reconstruction team• Radiation oncologist with access to state of the art equipment (IMRT, IGRT or Tomotherapy)• Medical Oncologist (chemotherapy and targeted therapy)• Support personnel including nutritional support and

Treatment options for headand neck cancer Early stages: surgery or radiation Advanced stage: chemoradiation or surgery followed by radiation and chemotherapy Very advanced cases: radiation and chemotherapy

Radiation Accurate simulation and contouring the targets Need for high doses Use IMRT or Tomotherapy to maximize coverage and minimize side effects Combine with chemotherapy

SimulationA face mask is usually made to hold thehead still and allow the targetingmarkings to be painted on the mask

CT scan is obtained at this time CT images are then imported into the treatment planning computer

In thesimulationprocess the CTand PET scanimages areused to createa computerreconstructionof the patientand cancer

http://www.rtog.org/CoreLab/ContouringAtlases.aspx

Digitally Reconstructed Images: Somepatients have very short necks making the radiationtargeting more difficult

Location of the larynx (in red) in two typical patients, one with a shortneck and one with a long neck, in the short neck patients, the shouldersmay be in the way of the radiation beam, requiring more complextechniques

For small cancers in the vocal cords it ispossible to keep the radiation far awayfrom other normal structures

Normal structures are identified on the computergenerated images, as well as the cancertargets, more advanced case with spread to thelymph nodes

Radiation zone (in blue) is designed to coverthe cancer and nodes and avoid normalstructures as much as possible

Radiation Dosedaily: Monday through Friday for 7weeks

Radiation Dose - PostOp

Poor Radiation Results FromNon-compliance in RadiationTechnique Critical Impact of Radiotherapy Protocol Compliance and Quality in the Treatment of Advanced Head and Neck Cancer: Results From TROG 02.02 Noncompliance, more relapses CO June 20, 2010 vol. 28 no. 18 2996-3001

IMRT and Side EffectsXerostomia Conventional IMRT12 months 74% 38%24 months 83% 29% Parotid-sparing intensity modulated versus conventional radiotherapy in head and neck cancer (PARSPORT): a phase 3 multicenter randomized controlled trial.

Combine a CT scan and linearaccelerator to ultimate in targeting (IGRT)and ultimate in delivery (dynamic, helicalIMRT) ability to daily adjust the beam(ART or adaptive radiotherapy)

Low riskparotid glandtumor (in red)may bepossible tokeep theradiation zone(blue) as smallas possible

Low risk parotid gland tumor, then using Tomotherapy toensure coverage of the tumor on the left, but avoidinggoing too deep and hitting normal parotid on other side

Since Tomotherapy takes a CT scan daily prior to radiation it isoften possible to observe the tumor shrinking during the course ofthe radiation (the radiation technique can be changed as the tumorshrinks – Adaptive Radiotherapy

Tumor regression duringTomotherapy

The cancer target (red circle) is expanded to give a margin around thecancer (radiation or blue circle) The computer then fits a radiation zone tomatch the blue target (red cloud or radiation zone). Daly CT scans allow thephysician to watch and see that the cancer is shrinking as expected

With Tomotherapy ACT scan is performeddaily prior to everytreatment so that if thetumor changes positionor shrink rapidly, theradiation target can beadjusted, this isreferred to as‘adaptive’ therapy andcan only be done onTomotherapy Machine

Chemotherapy

Randomized Trial XRT versusXRT + Erbitux Radiation plus Erbitux Radiation N Engl J Med 2006; 354:567-578

Randomized trial XRT alone versus XRT/Chemo radiation/cisplatin radiationJCO January 1, 2003 vol. 21 no. 1 92-98

Chemoradiation for Advanced Head and Neck Cancer SURVIVAL JCO Dec 20, 2010:5294-5300;

Chemoradiation HPV + HPV - JCO September 20, 2010 vol. 28 no. 27 4142-4148

Cure Rates for Advanced Head andNeck Cancer with Chemo-Radiation Cisplatin Erbitux (cetuximab)Failure-free survival among patients with cancer of oropharynx, hypopharynx, or larynx; IJROBP 2011:81;915

Quick Response to Radiationcombined with chemotherapy, Tonsilcancer gone by 2 ½ weeks

Same patient at 4 weeks

Tongue Cancer Before and 3Months after Radiation

Tomotherapy for SquamousCancer of the Tonsil

Chemoradiation Right PyriformSinus before and at 3 Years

Chemoradiation Results for Advanced Cancer of the Oropharynx (squamous cancer of the left tonsil that extended onto the base of tongue) PET prior to Treatment 2 YearsLater

ChemoradiationNasopharynx

Lymph Node Metastasis Often by the first new PET scan at 8 weeks, the cancer is no longer visible

Side Effects Side effects will relate to the size and location of the radiation field and the normal structures that are in the way of the beam

Side effects of radiation are related to thestructures that are near the tumor, so the radiationcan effect the teeth (dental problems) throat (sorethroat) and saliva glands (dryness and changes intaste)

Short Term Side Effects 1. Skin irritation 2. Dry Mouth and changes in taste and possible problems with teeth 3. Sore throat and problems with swallowing and dehydration and possible need for a feeding tube 4. Pain management problems 5. Laryngitis 6. Fatigue

RadiationDermatitisalmost everyonegets a sunburned reactionin the face orneck and creamsare required (likeAquaphor andSilvadene)

RadiationDermatitis(skin burn)often thethinnest part ofthe neck overthe voice box isaffected

Radiation Dermatitis… last dayand two months later

Radiation Dermatitis T3 Larynx treated with chemotherap y plus full dose radiation Skin burn on neck, last day of radiation

Radiation Dermatitis

Side Effects of Radiation to the Mouth

Same patient at three months

Mucositis (inflamed lining ofthe mouth) grade 2 The roof of the mouth gets a white coating after 3 weeks

Same patient 3 weeks later

Grade 3 mucositis

Mucositis The lining of the mouth and surface of the tongue can get quite inflamed from radiation, particularly when combined with chemotherapy. Most patients need pain medication for this phase

Mucositis – same patient twomonths later, sorenessgone, mouth still some whatdry and taste improving

Mucositis Lining of the roof of the mouth with radiation mucositis after 5 weeks of radiation and chemotherap y

MucositisMost patients needpain medication forthis phase and manypatients require afeeding tube toavoid dehydration ormalnutrition

Long Term Side Effects 1. The dryness may be permanent, depending on the amount of saliva glands in the field 2. Teeth may be vulnerable to decay, and caution is need with future dental care to avoid jaw bone problems (osteonecrosis) 3. Some patients have long term problems with swallowing 4. Some patients have persistent hoarseness 5. Small risk of low thyroid hormones 6. Carotid stenosis

Long Term SideEffects

Small blood vessels on Cancer area appearsnormal palate pale (achromia)(telangectasia) Mouth still dry but better lubricated

Samepatient at 2years /mouth stilldry andtaste forfood still notnormal

Radiation Results for Cancer ofthe Palate (roof of the mouth)Often palate lesions are superficial with not much to see, at 10months there are some blotchy radiation changes or discolorationon the roof of her mouth and the mouth looks a bit dry, but nosigns of the cancer

10 Years after MouthRadiation for Cancer of theSoft Palate Discoloratio n of the roof of the mouth

Long Term Side Effects Dryness and discoloration of the roof of mouth is common as is problems with teethLong term dental care is critical to avoidosteoradionecrosis (damage to the jaw bonewith exposed bone, may require hyperbaricoxygen treatment to heal)

Cure Rates are better for peoplewho stop smoking during theradiation Years JCO June 10, 2012 vol. 30 no. 17 2102-

Support Team

Radiation for Head & Neck Cancer Robert Miller MD www.aboutcancer.co m

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