Resumo

RIZZO, Annalisa et al. Superficial angiomyxoma in a pregnant cow. J. S. Afr. Vet. Assoc. [online]. 2020, vol.91, n.1, pp.1-5. ISSN 2224-9435.  http://dx.doi.org/10.4102/jsava.v91i0.2004.

A 3-year-old, pregnant, Alpine Brown cow showed a rapidly growing, pedunculated, skin mass located at the umbilical region, reaching 8 kg in weight over a 3-month period after its initial detection. Six days after parturition, the mass was completely surgically excised. During the follow-up period, the cow remained in good health, without signs of recurrence, and showed increased milk production. Histological examination of the mass revealed a loose proliferation of spindle-shaped or stellate cells, immersed in an abundant myxoid matrix with admixed numerous thin-walled blood vessels. Immunohistochemically, the tumour cells were positive for vimentin, α-smooth muscle actin, and desmin. Gross and histopathological features were compatible with superficial angiomyxoma, a subtype of angiomyxoma rarely described in humans, but not in the veterinary literature. The tumour did not infiltrate into the surrounding tissues, and there was no post-excision recurrence after 3 months. The possibility of hormonal dependence of the tumour during pregnancy is discussed based on such findings in some human cases.

Palavras-chave : angiomyxoma; cow; cutaneous; histopathology; hormone dependency; immunohistochemistry; pregnancy.

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