RESUMO
Tumor incidence in wild mammals is reportedly very low. Wild nutria, a large rodent, is known to carry many infectious diseases, but rarely exhibits neoplastic diseases. We necropsied a male wild nutria and found a large nodular mass in the left inguinal region, adjacent to the penis. Histopathologically, the mass was diagnosed as preputial gland adenoma. Spontaneous preputial gland adenomas are extremely rare in all animals. Moreover, reports of tumors in nutrias have been limited to adenocarcinomas of the lungs and uterus, as well as subcutaneous fibromas. Here, we describe preputial gland adenoma in a wild nutria.
Assuntos
Adenoma/veterinária , Glândulas Exócrinas/patologia , Neoplasias dos Genitais Masculinos/veterinária , Doenças dos Roedores/patologia , Roedores , Adenoma/diagnóstico , Adenoma/patologia , Animais , Animais Selvagens , Neoplasias dos Genitais Masculinos/diagnóstico , Neoplasias dos Genitais Masculinos/patologia , Espécies Introduzidas , Masculino , República da Coreia , Doenças dos Roedores/diagnósticoRESUMO
Papillomas caused by viral infection are well-known tumors in animals. Microscopic features typically include neoplastic epithelium with hyperkeratosis and koilocytes. An 8-y-old castrated male Shih Tzu dog was presented with a small exophytic mass on the external upper lip. The mass was diagnosed as a viral papilloma based on microscopic and immunohistochemical examination. Sebaceous cell differentiation was found in the neoplastic epithelium of the tumor, which is a rare finding in humans or animals.
Assuntos
Diferenciação Celular , Doenças do Cão/virologia , Papiloma/veterinária , Papillomaviridae , Infecções por Papillomavirus/veterinária , Neoplasias Cutâneas/veterinária , Animais , Doenças do Cão/patologia , Cães , Masculino , Papiloma/patologia , Papiloma/virologia , Infecções por Papillomavirus/patologia , Infecções por Papillomavirus/virologia , Pele/patologia , Neoplasias Cutâneas/virologiaRESUMO
Capillaria hepatica is a zoonotic nematode that uses rodents and other mammals as hosts, especially rats and mice, and causes hepatic granuloma and eventually fibrosis/cirrhosis. However, C. hepatica infection in nutria, a large semiaquatic rodent, has rarely been reported, and histopathologic features of the infection have not been described in detail. We conducted necropsy on 36 wild nutrias. Some animals were found to have milky spots, parasitic eggs and worms within hepatic microgranuloma involving central calcification with cell debris, macrophages, eosinophils and multinucleated giant cells (MGCs). Interestingly, the eggs were closely surrounded by MGCs and appeared to be destroyed without inducing further chronic changes. Based on microscopical examination, C. hepatica infection was diagnosed, and we describe its histopathological characteristics in wild nutrias.