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Anatomic Relationships and Barriers or Pathways for Tumor Spread in the Hypopharynx and Larynx Hypopharynx The hypopharynx is in continuity with the oropharynx and extends from the level of the hyoid bone to the opening of the esophagus. It is…

General Introduction There is considerable literature on all aspects of precursor lesions for squamous cell carcinoma of the upper aerodigestive tract (UADT). Most data are specific to oral and laryngeal lesions. A common feature of all these precursor lesions, irrespective…