This study investigated the risk factors for developing pharyngocutaneous fistula, the most common complication following total laryngectomy.

We included all patients who underwent total laryngectomy and bilateral neck dissection from 2009 to 2021. Patients excluded were those with hypopharyngeal involvement, total or partial pharyngectomy, base of the tongue resection, large pharyngeal defects requiring free/pedicle flap reconstruction, or salvage laryngectomy.

A total of 164 patients participated in the study. Multivariate regression analysis identified two independent predictors of pharyngocutaneous fistula formation: pharyngeal reconstruction with simple interrupted sutures (odds ratio: 3.12, 95 per cent confidence interval: 1.31–17.00, p = 0.010) and radical neck dissection (odds ratio: 3.16, 95 per cent confidence interval: 1.13–8.82, p = 0.028).

Our findings suggest that pharyngeal reconstruction using simple interrupted sutures and radical neck dissection are independent risk factors for pharyngocutaneous fistula development. Based on this, we recommend using the modified Cushing suture technique over simple interrupted sutures due to its association with a significantly lower pharyngocutaneous fistula rate.

To verify the main advantages and drawbacks of mechanical suturing for pharyngeal closure after total laryngectomy versus a manual suturing technique.

A retrospective review was carried out of 126 total laryngectomies performed between 2008 and 2018. Manual closure was performed in 80 cases (63.5 per cent) and mechanical suturing was performed in 46 cases (36.5 per cent).

Mechanical suturing was used significantly more frequently in patients with: glottic tumours (p = 0.008), less local tumour extension (p = 0.017) and less pre-operative morbidity (p = 0.014). There were no significant differences in the incidence of pharyngocutaneous fistula between the manual suture group (16.3 per cent) and the mechanical suture group (13.0 per cent) (p = 0.628). None of the patients treated with mechanical suturing had positive surgical margins. Cancer-specific survival for the mechanical suture group was higher than that for the manual suture group (p = 0.009).

Mechanical suturing of the pharynx after total laryngectomy is an oncologically safe technique if used in suitable cases.