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Basics of Head and Neck IMRT Planning and Anatomy - ASTRO

Basics of Head and Neck IMRT Planning and Anatomy - ASTRO

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Percentage g Incidence <strong>and</strong> Distribution <strong>of</strong><br />

Pathologically Involved Nodes in a Clinical<br />

Node Positive after Therapeutic p Radical<br />

<strong>Neck</strong> Dissection<br />

I II III IV V<br />

Oropharynx<br />

n=165<br />

14 71 42 28 9<br />

Larynx n=183 7 57 59 29 4<br />

Hypopharynx yp p y<br />

n=104<br />

Oral Cavity<br />

n=324<br />

10 76 73 46 11<br />

46 43 33 15 3<br />

Shah, J.P., Patterns <strong>of</strong> cervical lymph node metastasis from squamous<br />

carcinomas <strong>of</strong> the upper aerodigestive tract. Am J Surg, 1990. 160(4): p. 405-9.

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