Design
Retrospective study of 61 patients with p16+ve OPSCC whom had neck dissection and prior or simultaneous trans-oral surgery. Histopathology reports of neck dissection specimens were compared to preoperative clinical and radiological reports to determine the distribution of clinically known and occult nodal disease at each neck level and its concordance with preoperative assessment. Positive and negative predictive values for pathological nodal disease (pN+ve or pN0) were attributed to clinically assigned node-positive (cN+ve) or node-negative (cN0) status at each neck level.