Omitting Postoperative Radiotherapy to the Contralateral Pathologically Node-Negative Neck Appears to Be Safe in Oropharyngeal Squamous Cell Carcinoma

Background There are currently no guidelines for adjuvant radiotherapy of the contralateral pathologically node-negative neck in squamous oropharyngeal carcinoma. The aim of this study was to determine whether omission of contralateral radiotherapy affects oncologic outcome. In addition, we aimed to determine factors that precisely lead to postoperative irradiation of the contralateral pathologically negative neck.