Fig. 1From: Co-presence of human papillomaviruses and Epstein–Barr virus is linked with advanced tumor stage: a tissue microarray study in head and neck cancer patientsa–d The case of moderately differentiated (G2) oral squamous cell carcinoma (a, b Hematoxylin and Eosin staining) with a diffuse and strong expression of E6 protein of HPV by immunohistochemistry (a and c figures, ×4 magnifications; b and d figures, ×20 magnifications)Back to article page