Granulosa cell tumour with metastasis in a cat

  • Márcia Regina Giacóia Universidade de São Paulo, Faculdade de Medicina Veterinária e Zootecnia, Departamento de Patologia, São Paulo, SP
  • Paulo César Maiorka Universidade de São Paulo, Faculdade de Medicina Veterinária e Zootecnia, Departamento de Patologia, São Paulo, SP
  • Clair Motos Oliveira Universidade de São Paulo, Faculdade de Medicina Veterinária e Zootecnia, Departamento de Reprodução Animal, São Paulo, SP
  • Idércio Luiz Sinhorini Universidade de São Paulo, Faculdade de Medicina Veterinária e Zootecnia, Departamento de Patologia, São Paulo, SP
  • Maria Lúcia Zaidan Dagli Universidade de São Paulo, Faculdade de Medicina Veterinária e Zootecnia, Departamento de Patologia, São Paulo, SP
Keywords: Granulosa cell tumour, Ovary, Cats, Immunohistochemistry, Paraneoplastic syndromes

Abstract

The clinical, gross and microscopical features of a granulosa cell tumour in the ovary of a 2-year-old cat are described. This is a rare tumour in cats, moreover because of the animal’s age. It was diagnosed clinically by ultrasound examination. The tumour, a cystic mass in the region of the left ovary, metastasized to the epiplon and lungs. Tumour cells expressed vimentin and were arranged in a diffuse sarcomatous pattern, supported by a fine fibrovascular stroma. The presence of hair loss and repeated oestrus as clinical signs are indicative of orthoendocrine paraneoplastic syndrome, due to excessive oestrogen stimulation. This tumour should be considered in the differential diagnosis of behavioural disturbances in female cats.

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Published
1999-01-01
How to Cite
Giacóia, M., Maiorka, P., Oliveira, C., Sinhorini, I., & Dagli, M. (1999). Granulosa cell tumour with metastasis in a cat. Brazilian Journal of Veterinary Research and Animal Science, 36(5), 250-252. https://doi.org/10.1590/S1413-95961999000500005
Section
VETERINARY MEDICINE