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T staging of a hypopharygeal tumour

The T staging of a hypopharygeal tumour is as follows

Definition

The hypopharynx includes the pyriform sinuses, the lateral
and posterior hypopharyngeal walls, and the postcricoid region.

  • T1: tumour is limited to one subsite of the hypopharynx and 2 cm or less in greatest dimension
  • T2: tumour invades more than one subsite of the hypopharynx or an adjacent site, or measures more than 2 cm but not more than4 cm in greatest dimension without fixation of the hemilarynx
  • T3: tumour is more than 4 cm in greatest dimension or with fixation of the hemilarynx
  • T4
    • T4a: tumour invades thyroid/cricoid cartilage, hyoid bone, thyroidgland, oesophagus, or central compartment soft tissue
    • T4b: tumour invades prevertebral fascia, encases the carotid artery, or involves mediastinal structures

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