Figure 1
From: A comparison of clinically utilized human papillomavirus detection methods in head and neck cancer

Top: Dako in situ hybridization positive case showing brown intranuclear signals, this tumor was HPV16 positive by PCR (left panel: low power, right panel: high power). Bottom: Ventana in situ hybridization positive case showing blue/purple intranuclear signals, this tumor was HPV16 positive by PCR (left panel: low power, right panel: high power).