Sebaceous Adenocarcinoma in a Cat

Terim Kapakin K.A., F. Bozkurt, R. Haziroğlu: Sebaceous Adenocarcinoma in a Cat. Acta Vet. Brno 2008, 77: 123-125. In this study, the sebaceous gland adenocarcinoma was presented in the external auditory canal of a 10-year-old female tabby cat. There were three tumoural masses located macroscopically in the external auditory canal in the dimensions of 0.2 × 0.5, 0.3 × 0.5, and 0.1 × 0.1 cm, and they were of hard consistency. The cut sections of these tumoural masses were of multilobular appearance and ranged from white to yellow colour. Histopathological examination revealed the presence of oval or round shaped tumour cells with hyperchromatic nuclei and cytoplasmic lipid vacuoles that were divided by fibrous tissue into lobules. Atypism and mitosis were not significant. Irregular necrotic areas and mononuclear cell infiltrations composed of lymphocytes and histiocytes were also observed. In conclusion, our laboratory service confirms that the sebaceous gland adenocarcinoma is a rarely occurring tumour in cats with specific histopathological lesions. Cat, external auditory canal, sebaceous carcinoma, pathology Tumours of the sebaceous glands are reported in all domestic animals, more frequently in old cats and dogs (Strafuss 1976; Vail et al. 1996). They are classified as hyperplasia, epithelioma, glandular adenoma, and carcinoma according to their histological features and growth (Goldschmidt and Hendrick 2002; Gross et al. 2005; Max’s House 2005). Among tumours of the sebaceous glands, adenomas are observed frequently in dogs (Scott and Anderson 1990), whereas they are not so frequent in cats (Scott and Anderson 1991). However, carcinomas are rare both in cats and dogs (McMartin and Gruhn 1977; Gross et al. 2005; Max’s House 2005). The sebaceous glands’ tumours constitute approximately 8% of all skin tumours in the canine (Scott and Anderson 1991; Gross et al. 2005; Max’s House 2005) and 2.3 4.4% in the feline (Scott 1980; Gross et al.2005; Max’s House 2005) species. The objective of this report was to present a rare and unique case of sebaceous adenocarcinoma confirmed histopathologically in a cat.