[Overview of thyroid gland involvement and its prognostic value on advanced laryngeal cancer].

Laryngeal cancer is the second most common malignancy in the head and neck region. The guidelines recommend prophylactic thyroidectomy for patients with advanced laryngeal cancer, but its prognostic value remains elusive. In this review, the incidence, risk factors, prognostic value of thyroid invasion in patients with laryngeal cancer were reviewed. The effect of prophylactic thyroidectomy on the outcome of advanced laryngeal cancer patients was also discussed.