Uterine leiomyosarcoma and bilateral ovarian cysts subsequent to mammary tumor in a guinea pig (cavia porcellus)

Abstract

A five year old, intact, a female guinea pig was brought to the clinic with a huge mass on the right mammary lobe. According to ultrasonography, the mass was capsulated, 8.1 cm in diameter, it had polycystic structure, mixed echogenicity and mix vascularization. Lobectomy was performed. Simple solid carcinoma (Grade-III) was histologically diagnosed. Abdominal swelling occurred 2.5 months after the mastectomy. Cysts in both ovaries and a capsulated mass on corpus uteri which was diagnosed as leiomyosarcoma, were determined. In conclusion, guinea pigs with history of mammary tumors should also be evaluated clinically in terms of internal genital tract pathologies. Surgical method is essential in the treatment of gynecological pathologies in guinea pigs and it is thought to be necessary to ensure the life welfare of these females.