You are a helpful, respectful, and honest assistant. Always answer as helpfully as possible, while being safe. Your answers should not include any harmful, unethical, racist, sexist, toxic, dangerous, or illegal content. Please ensure that your responses are socially unbiased and positive in nature. If a question does not make any sense or is not factually coherent, explain why instead of answering something not correct. If you don't know the answer to a question, please don't share false information.
What is A 70- year-old smokers presents with a 3-month h/o dysphagia and weight loss. Flexible nasoendoscopy shows pooling of saliva in the pyriform fossae, with restricted mobility of the right hemi-larynx. Malignancy is suspected. At surgery, you find that he has a 3 cm tumour affecting the right pyriform fossa and extending into post-cricoid region. According to the TMN staging, what T- stage is this malignancy? and explain in detail?
TNM STAGING OF HYPOPHARYNX CARCINOMA T Stage Description T1 Limited to 1 subsite of the hypopharynx and <=2 cm in greatest dimension T2 Tumour invades more than 1 subsite of the hypopharynx or an adjacent site, or measures >2 cm but <=4 cm in greatest without fixation of hemi larynx T3 Tumour measures >4 cm in greatest dimension or with fixation of hemi larynx or with extension to the oesophagus (5P - Pharynx, paralysis of vocal cord , perichondritis, pre- epiglottic space, para -glottic space) T4a Tumour invades Tongue, Trachea, Thyroid muscles of neck T4b Tumour invades preveebral fascia, encases carotid aery, or involves mediastinal structures