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A 64-year-old patient with a cT2N1 p16-positive squamous cell carcinoma of the left tonsil planned for concurrent chemoradiotherapy. The planning CT (A) shows a mass effect originating from the left tonsil, whereas the planning T2-weighted MRI (B) allows better visualization of the left tonsil tumor and also detects a left retropharyngeal lymph node metastasis (white arrow).
