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  • Title: Uterine lesions in 32 female miniature pet pigs.
    Author: Ilha MR, Newman SJ, van Amstel S, Fecteau KA, Rohrbach BW.
    Journal: Vet Pathol; 2010 Nov; 47(6):1071-5. PubMed ID: 20817893.
    Abstract:
    Thirty-two 4-month-old to 19-year-old female miniature pet pigs were spayed. Uterine lesions were present in all except 8 pigs. The 24 remaining pigs had diffuse cystic endometrial hyperplasia, of which 14 had smooth muscle tumors, including leiomyomas and leiomyosarcomas, in the uterus or broad ligament. Nodular endometrial lesions-including adenocarcinomas, adenomas, and/or adenomyosis-were present in 10 pigs, 3 of which had concurrent smooth muscle tumors. Pyometra was present in 3 pigs. In uterine sections with cystic endometrial hyperplasia, adenomyosis, or adenomas, approximately 70% of epithelial nuclei expressed estrogen receptor and progesterone receptor immunohistochemically; in adenocarcinomas, expression was 20%. Regardless of malignancy, more than 50% of nuclei in smooth muscle tumors expressed estrogen receptor and progesterone receptor. Aging was associated with the development of uterine lesions in miniature pet pigs.
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