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A Retrospective Study of 586 Tumours in Brazilian Cattle

Lucena, R.B., Rissi, D.R., Kommers, G.D., Pierezan, F., Oliveira-Filho, J.C., Macêdo, J.T.S.A., Flores, M.M., Barros, C.S.L.
Journal of comparative pathology 2011 v.145 no.1 pp. 20-24
Pteridium aquilinum, bladder, cattle, endocrine system, eyes, female reproductive system, hematuria, ingestion, liver, mammary glands, necropsy, pancreas, respiratory system, retrospective studies, squamous cell carcinoma
Records from 6,706 necropsy examinations of cattle performed over a 45-year period were surveyed and 586 cases of neoplasia were identified. The organ system most frequently affected by neoplastic disease (n=139 cases) was the alimentary tract. This finding was attributed to a high incidence of squamous cell carcinoma of the upper alimentary tract associated with the chronic ingestion of bracken fern (Pteridium aquilinum). This carcinogenic plant was also associated with a relatively high incidence (n=35 cases) of urinary bladder tumours (enzootic haematuria). Tumours of the alimentary tract were followed, in decreasing order of frequency, by tumours of the skin and subcutis (n=129 cases), haemopoietic tissue (n=101 cases), the eye and periorbital tissues (n=88 cases), the urinary system (n=44 cases), the female reproductive system (n=21 cases), the endocrine system (n=16 cases), the liver and pancreas (n=12 cases), the nervous system (n=6 cases), the respiratory system (n=6 cases) and the mammary gland (n=1 case). The primary anatomical location of 16 tumours was undetermined.