CSO EXAM - CH 21 HN CANCER QUESTIONS WITH CORRECT ANSWERS

CSO EXAM - CH 21 HN CANCER QUESTIONS WITH v v v v v v v v




CORRECT ANSWERS 2025/2026 v v v




where do the majority of cancers occur for HN cancers? - CORRECT ANSWER -90% are SCCa
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what is incidence of HN cancers in comparison to all cancers? - CORRECT ANSWER -3% of all cancers
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What are the two most important risk factors for HN cancer? - CORRECT ANSWER -Etoh + tobaccoo
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*with exception of salivary and oropharyngael cancers*
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Risk factors for salivary cancers - CORRECT ANSWER -old age
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v radiation exposure v




asbestos



Risk factor for oropharyngael cancer - CORRECT ANSWER -HPV
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Locations of HN cancer - CORRECT ANSWER -Oral cavity = front 2/3 of tongue
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v salivary glands = parotid, sublingual, submandibular
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paranasal sinuses v




pharynx-oropharyngael,softpalate,BOT,tonsils Larynx -
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v vocal cords, epiglottis
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LN -- if only spot on PET is HN LN than assumed met SCCa pf unkown primary
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30-40% of pt w/ early localized disease have what kind of treatment? - CORRECT ANSWER - usually
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require only 1 modality (surgery or radiotherapy)
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, early localized disease = stg I or stg II w/o LN
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what percent of stg III and stg IV HN cancers require chemo/XRT? - CORRECT ANSWER -60%
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*require b/c of underlying structures or mets*
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What areas of HN cancer are more likely to require EN? - CORRECT ANSWER -floor of mouth + BOT
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XRT can exacerbate what? - CORRECT ANSWER -tooth decay
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XRT works best with rapidly dividing cells. What HN cancer would you consider to have rapidly
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dividing cells? - CORRECT ANSWER -Oral mucosa
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What is a benefit of IMRT - CORRECT ANSWER -more precise
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dec long term toxiciites to oropharyngeal, paranasal sinus, nasopharyngeal areas
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dec XRT to major structures such as salivary glands, temporal lobes, mandible, auditory, optic
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What is common tx for HN cancer? - CORRECT ANSWER -2.0 - 70 gy in 7 weeks w/ single agent cisplatin
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q 3 weeks @ 100 mg/m2
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*remember XRT has cumulative effect* v v v v




Chemo is std tx for what - CORRECT ANSWER -locally advanced cancer --- XRT + cisplatin
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what is used for induction chemo for HN? - CORRECT ANSWER -FU + Cisplatin
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*some evidence that docetaxel may increase response*
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