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A 57-year-old male patient with T2N3bM0 undifferentiated nasopharyngeal cancer. Pretreatment gadolinium-enhanced axial T1-weighted MR imaging of the neck demonstrates metastatic right level IIb lymph nodes (A). Parametric maps (C, D, and E) show higher volume transfer constant (Ktrans = 0.26/min), Kep, and area under curve, respectively. Axial contrast-enhanced neck CT at 6 months post-chemoradiation treatment demonstrates a favorable response to treatment (B).
