Treatment algorithm for parotid gland cancer. Purple: general categories or stratification; red: surgery; dark green: radiotherapy; white: other aspects of management; blue: systemic anticancer therapy. ChT, chemotherapy; CNB, core needle biopsy; END, elective neck dissection; ENI, elective neck irradiation; FNA, fine-needle aspiration; ND, node dissection; nVII, seventh nerve; RT, radiotherapy. aDefinition of high-grade tumours is described in Section 1 of the Supplementary Material, available at https://doi.org/10.1016/j.esmoop.2022.100602.