v.16, n.3, p.199-202, 2023
Case Report
Congenital fibropapillomatosis in a pig
Lara Cristine Schwertz, Débora Miglioranza, Claiton Ismael Schwertz, Mateus Eloir Gabriel, Ademar Masaaki Mori, Kelen Regina Ascoli Baldi, David Driemeier, Ricardo Evandro Mendes, Teane Milagres Augusto Gomes
This paper reports a case of congenital cutaneous fibropapillomatosis in a piglet from a swine-producing farm in the municipality of Concórdia, Santa Catarina – Brazil. The main gross lesion was an exophytic mass with a pinkish color, irregular surface, and margins, sometimes with a cerebrum-like appearance, extending from the right cervical and scapular regions to the craniomedial portion of the right forelimb. Histologically, the mass consisted of a well-delimited proliferation of fibrous tissue in the superficial dermis, covered by a proliferation of keratinocytes with low cellular atypia. Diffuse and severe hyperkeratosis of the epidermis was also observed. Immunohistochemistry for papillomavirus was negative, indicating that this animal had spontaneous non–viral papillomatosis. This condition is rare in pigs, with only two other cases described in the literature.
Keywords: congenital lesions, histopathology, immunohistochemistry, papillomavirus, swine skin diseases.
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