Den Otter W, Hill F W, Klein W R, Everse L A, Ruitenberg E J, Van der Ven L T, Koten J W, Steerenberg P A, Faber J A, Rutten V P
Department of Functional Morphology, Faculty of Veterinary Medicine, Utrecht University, The Netherlands.
Am J Vet Res. 1995 Nov;56(11):1440-4.
In Zimbabwe, ocular squamous cell carcinoma (OSCC) was frequently observed in 5 breeding herds of Simmental cattle, a Bos taurus breed originating from Switzerland. In these herds, initial signs of OSCC were already noticeable in cattle about 3 years old. Gradually, OSCC prevalence increased, and 36 to 53% of cattle over 7 years old had 1 or more tumors. More tumors developed in Simmental cattle with periorbital white skin than in cattle with periorbital pigmented skin. Other breeds of cattle (eg, Friesian) also are partly white-faced and live in Zimbabwe in a comparable environment; yet, OSCC prevalence was lower in those breeds.
