Materials and methods
The clinical data of 93 patients who underwent primary pyriform sinus
carcinoma resection via the paraglottic space approach, from January
2014 to January 2017 were retrospectively analysed. All patients were
operated for the first time without preoperative chemoradiotherapy and
underwent electronic laryngoscopy, narrow band imaging, electronic
gastroscopy and cervicothoracic enhanced CT before surgery. Patients
with distant metastasis or second primary cancer and general anaesthesia
contraindications were excluded from this study. The age of the patients
ranged from 41 years to 87 years. Amongst the 93 patients, 91 were males
and 2 were females with an average age of 58.8±9.51 years. The general
clinical data and tumour characteristics of all patients (in accordance
with the American Joint Committee on Cancer 2017 8th edition TNM staging
of hypopharyngeal carcinoma) are summarised in Tables 1–2. The STROBE
standard reporting guidelines for cohort studies were followed.