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Chapter-056 Radiotherapy in Head and Neck Cancers

BOOK TITLE: Head & Neck Surgery (2 Volumes)

Author
1. Mendenhall William M
ISBN
9788184486797
DOI
10.5005/jp/books/10351_56
Edition
1/e
Publishing Year
2009
Pages
28
Author Affiliations
1. University of Florida Health Science Center, Gainesville, Florida, USA, University of Florida College of Medicine, Gainsville, Florida, USA
Chapter keywords
radiotherapy, neck cancer, head cancer, conformal radiotherapy, intensity-modulated radiotherapy, cervical lymph nodes, infrahyoid epiglottic cancer, pharyngoepiglottic fold, metastatic tumor, cricoid cartilage

Abstract

This chapter discusses radiotherapy in head and neck cancers, where radiotherapy techniques can be broadly stratified into three-dimensional conformal radiotherapy (3DCRT) and intensity-modulated radiotherapy (IMRT). Clinically positive neck nodes are cervical lymph nodes believed to harbor metastatic cancer on the basis of physical or radiographic findings, where a clinically negative neck has no such findings and may contain no metastatic tumor or only subclinical deposits of cancer. For a false cord or infrahyoid epiglottic cancer, the bottom of the cricoid cartilage is usually chosen. The pyriform sinus lies posteriorly in the pharynx, extending from its upper limit on the pharyngoepiglottic fold to its apex located between the superior and inferior borders of the cricoid cartilage. The initial lower portal margin should include the entire pharyngeal wall because of these tumors propensity to have skip lesions.

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