Fig. 1

Enhanced CT revealed a large left neck mass with partial enhancement. Necrosis of the inner tumor was suspected. a Macroview of the tumor: PA was completely surrounded by MEC. Red line, cancer; blue line. PA, b MRI revealed a mass with bumpy surface in the right submandibular gland with a partially unclear border. c Macroview of the tumor: MEC existed outside of PA. Red line, cancer; blue line, PA