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Axial MR images of an HPV-negative OPSCC. A 54-year-old patient was diagnosed with an OPSCC in the right palatine tonsil. A, STIR MR image shows a large hyperintense mass in the oropharynx (arrow). A b=750 diffusion-weighted image (B) and an ADC map (C) show decreased ADC. An ROI was drawn on the b=750 diffusion-weighted image and copied to the ADC map. In this ROI, ADCminimum measured 0.826 × 10−3 mm2/s.
