Figure 1
From: Bovine papillomavirus E5 and E7 oncoproteins in naturally occurring tumors: are two better than one?
Examples of BPV induced tumours in its natural host, bovine, and in its heterologous host, horse. A. Persistent papillomatosis of the skin in a cow. B. Diffuse papillomatosis of the oesophagus in a cows , the arrows indicate the papillomas. C. Multiple haemangiosarcomas and urothelial carcinoma of the urinary bladder in a cows. D. Multiple nodular sarcoids in the paragenital and mammary region in a horse.