Tumours of the Hypopharynx, Larynx and Trachea
Squamous cell carcinoma is, by far, the most important tumour of the hypopharynx, larynx and trachea. It is clearly related to j the abuse of tobacco and alcohol and, as such, could be dras- " tically reduced if individuals would only alter their lifestyles. Precursor lesions have been identified and the genetic-molecular events underlying their origin and progression into clinical- ■ ly apparent carcinomas are gradually being elucidated. The " terminology of these precursor lesions, however, is still evolving | and no single classification has been universally accepted. The three most commonly used classifications and their equivalent terms are presented.
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