Estudo retrospectivo de 1.647 tumores mamários em cães

Abstract

RESUMO.-Tumores mamários são comuns em cães, e constituem o neoplasma mais frequente em cadelas. Este estudo tem como objetivos principais estabelecer a prevalência dos tumores mamários, e dos diferentes tipos histológicos (neoplásicos e não-neoplásicos), diagnosticados em cães no Laboratório de Patologia Veterinária Data about breed, gender, and age of dogs, tumor localization, morphologic diagnosis, and metastasis occurrence were analyzed. In the biopsy cases, 1,495 tumors were diagnosed, considering the presence of more than one type of tumor in some of the dogs. From those, 1,465 were neoplastic and 30 were non-neoplastic. Within the neoplasms, 390 (26.6%) were benign and 1,075 (73.3%) were malignant. The benign/ malignant ratio was 1:2.75. During the years 2000-2008, 1,125 necropsies of dogs were performed, 132 (11.64%) of which with mammary gland tumors. There were 152 morphologic diagnoses, being 150 of neoplastic and two of non-neoplastic lesions. Simple carcinoma was the most prevalent histologic type, both among biopsy and necropsy cases. On necropsy cases, metastases to lymph nodes and distant organs were seen in 39 (29.5%) and 64 (53,3%) cases, respectively.INDEX TERMS: Diseases of dogs, pathology, oncology, mammary gland tumors.

Influence of Surgical Technique on Overall Survival, Disease Free Interval and New Lesion Development Interval in Dogs with Mammary Tumors

“…These differences may be related to regional characteristics as contraceptive use [19] and delay in the search for veterinary assistance. In this study, benign mixed tumor was the most frequent benign neoplasm (56.2%), but it was the second most frequently diagnosed (40%) by Filho et al (2010) [23]. Likewise, carcinoma in mixed tumor represented 47.5% of malignant neoplasms in this study, and 20.5% on the study by Filho et al (2010) [23].…”

“…In this study, benign mixed tumor was the most frequent benign neoplasm (56.2%), but it was the second most frequently diagnosed (40%) by Filho et al (2010) [23]. Likewise, carcinoma in mixed tumor represented 47.5% of malignant neoplasms in this study, and 20.5% on the study by Filho et al (2010) [23]. Frequencies reported in this study for each histological type differ from international literature reports [2] [15] [16], probably due to a lack of histological standardization for canine mammary tumors [24].…”

“…However, De Nardi et al (2002) [19] and Filho et al (2010) [23], reported malignancy ratios of 68.4% and 73.3%, respectively. These differences may be related to regional characteristics as contraceptive use [19] and delay in the search for veterinary assistance.…”

Lesões de adrenais em 300 cães

“…Metástase de carcinoma mamário foi a mais prevalente e ocorreu em três casos (33,3% dos cães com metástase). As adrenais são comumente descritas como sítios de metástase de neoplasmas mamários e atingiu 15% dos casos em um estudo (Oliveira Filho et al 2010). Os demais tumores metastáticos foram: osteossarcoma, melanoma, linfoma, colangiocarcinoma, sarcoma histiocítico e adenocarcinoma pulmonar.…”

Postmortem findings in collared peccaries raised in captivity in northeastern Brazil

“…The clinical and pathological presentation of mammary carcinoma with metastases in the lung in one of our animals was similar to what has been described in small domestic animals. Metastases are major complications of malignant neoplasms in the mammary tissue and lungs, which are the most frequently affected organs (Oliveira Filho et al 2010).…”