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A pathologic finding about one or more characteristics of nasopharyngeal cancer, following the rules of the TNM AJCC v7 classification system as they pertain to staging of regional lymph nodes. The distribution and the prognostic impact of regional lymph node spread from nasopharynx cancer, particularly of the undifferentiated type, are different from those of other head and neck mucosal cancers and justify the use of a different N classification scheme. (from AJCC 7th Ed.)
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