Efficacy of some clinical factors on proposing the course of malignant mammary tumours in bitches [Polish]

摘要

Studies were carried out on 68 bitches operated for mammary tumours in the Department of Obstetrics and Gynecology of the Faculty of Veterinary Medicine in Lublin, and a private veterinary clinic in Lublin between 1999-2000. The study indicated that the risk of developing malignant tumors occurred in 6-year-old bitches and increased progressively with age. The peak incidences occurred in 10-11-year-old bitches. The highest proportion of tumors were simple carcinomas (26.47 %), complex carcinomas (20.59 %) and sarcomas (20.59 %). Within 2 years after the operations local recurrence was indicated in 32 (47.06 %) bitches and distant metastases in 34 (50.0 %) bitches and 36 (52.9 %) had died/euthanasia because of mammary tumors. In 32.5 % of the bitches the tumors developed in the third anterior glands and in 67.65 % in the posterior two pairs of glands. It appeared that the greater the tumors were, the poorer the prognosis. In the case of bitches having tumors smaller than 3 cm in diameter only 26.66 % died/euthanasia as a result of tumors two years post surgery compared with 52.63 % and 64.7 % for tumors whose diameter was 3-5 cm and greater than 5 cm. The results of the studies indicate that prognosis is directly related to the histological type of the tumors. Prognosis was the worst in the case of diagnosing sarcomas, carcinoma-sarcomas and simple carcinomas. Post surgical survival for these tumors was: 14.29 %; 25.0 % and 44.44 % respectively. The age of the bitch at the time of operation, duration of symptoms before the operation and locality of tumors did not have a significant influence on prognosis.