Fig. 3
HPV status is consistently maintained across stages of tumor progression. The FNA is shown on the left (a-c), and the resection of the primary oropharyngeal carcinoma is shown on the right (d-f). Both samples show p16 staining (b, e) and the presence of DNA ISH signals (c, f; Ventana Inform HPV III Family 16 Probe and DAKO HPV 16 type-specific probe, respectively).