A 54-year-old man presented with a left neck mass (see differential diagnosis of neck masses). He was found to have a left tonsillar carcinoma which had positive margins when surgically excised. He then underwent chemoradiation treatment with resolution of the area of the primary lesion. Three months after his initial presentation he was taken to the operating room for a left radical neck dissection to address the residual left cervical adenopathy, seen here on pre-op CT scan. Adenopathy extended from the root of the neck up the angle of the mandible.