Figure 1From: Cyclin A1 shows age-related expression in benign tonsils, HPV16-dependent overexpression in HNSCC and predicts lower recurrence rate in HNSCC independently of HPV16 Immunohistochemical staining of Cyclin A1 (a), p16 (b) and p53 (c) in HNSCC. Tumor of a 77 year old man; primary site: tonsil; HPV16 positive; Cyclin A1 overexpression (category 8); P16 overexpression (category 9); P53 negative (category 1); original magnification: x50Back to article page