We report a case of congenital fibropapillomatosis in the head and neck of a piglet from a swine breeding farm where sporadic cutaneous papillomas of the prepuce and scrotum had previously occurred in several boars. Histologically, the tumor consisted of multiple exophytic, papillary projections composed of branching, densely cellular, fibrovascular stalks covered by hyperplastic keratizing squamous epithelium. Ultra-structural examination failed to reveal viral particles. Cutaneous papillomatosis is rare in swine. To the best of our knowledge, this is the second report of congenital fibropapillomatosis in pigs.
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The presence of human papillomavirus in sinonasal pap-illomas, demonstrated by polymerase chain reaction with consensus primers.
Hum Pathol24: 1354–1356, 1993
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A transmissible genital papilloma of the pig resembling condyloma acuminatum of man.
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Ausgedehnte kongenitale fibroepitheliale Papillome bei einem Ferkel.
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5.
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Cell proliferation correlates with prognosis in acinic cell carcinomas of salivary gland origin. Immunohistochemical study of 30 cases using the MIB 1 antibody in formalin-fixed paraffin sections.
J Pathol173: 13–21, 1994
