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19 Cards in this Set
- Front
- Back
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OS5 Stage I
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63%
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OS5 Stage II
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52%
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OS5 Stage III
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56%
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OS5 Stage IV
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39%
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T1
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confined to nasopharynx, or tumor extends to oropharynx and/or nasal cavity without parapharyngeal extension
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T2
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tumor with parapharyngeal extension (posterolateral infiltration of tumor, i.e. beyond the pharyngobasilar fascia)
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T3
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involves bony structures and/or paranasal sinuses
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T4
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intracranial extension and/or involvement of cranial nerves, infratemporal fossa, hypopharynx, orbit, or masticator space
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N1
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unilateral nodes, 6 cm or less, above the supraclavicular fossa, and/or retropharyngeal lymph nodes 6 cm or less (unilateral or bilateral)
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N2
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bilateral nodes, 6 cm or less, above the supraclav fossa
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N3a
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lymph node greater than 6 cm
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N3b
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extension to the supraclav fossa (defined as the triangular region described by Ho, bounded by the superior margin of the sternal head of the clavicle, the superior margin of the lateral end of the clavicle, and the point where the neck meets the shoulder. This includes some of level IV as well as V.)
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I
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T1 N0
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II
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T1-T2 N1, T2 N0 (i.e. T2 or N1)
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III
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T3 N0-2, or T1-3 N2 (i.e. T3 or N2)
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IVA
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T4 N0-2
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IVB
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N3
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IVC
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M1
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Changes from 6th edition
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T2a lesions moved to T1. T2b moved to T2.
Stage IIB was moved to II and Stage IIA merged with Stage I New designation for retropharyngeal lymph nodes (all are N1 nodes) |
