Canine tarsal gland epitheliomas and adenomas: a retrospective study of 290 cases in Brazil

A total of 290 cases of tarsal gland adenomas and epitheliomas from canine patients were analyzed to determine the frequency and to better characterize their histopathological features. Tissue samples were examined in two veterinary pathology laboratories in Curitiba, Brazil, which receive samples from all over the country. Tarsal epitheliomas were significantly more frequent than tarsal adenomas (77.9% and 20.7%, respectively). In four cases (1.4%), the lesion contained both types of neoplasms. A total of 39 breeds were represented. The most common breeds were: English cocker spaniel (12.4%), poodle (10.3%) and Labrador retriever (9.3%). Mixed breed dogs represented 13.1% of the total. The upper eyelids were most commonly affected (65.2%), males and females were equally represented and there did not appear to be a predilection for either side of the face. Mitotic figures were most common in epitheliomas. The pigmented subtype was the most common form of epithelioma (59.7%). Whereas within the adenomas, the classic subtype (without inflammation or pigmentation) was the most common form (61.7%); and the inflamed subtype was also highly represented (20.0%).(AU)

Canine tarsal gland epitheliomas and adenomas: a retrospective study of 290 cases in Brazil

A total of 290 cases of tarsal gland adenomas and epitheliomas from canine patients were analyzed to determine the frequency and to better characterize their histopathological features. Tissue samples were examined in two veterinary pathology laboratories in Curitiba, Brazil, which receive samples from all over the country. Tarsal epitheliomas were significantly more frequent than tarsal adenomas (77.9% and 20.7%, respectively). In four cases (1.4%), the lesion contained both types of neoplasms. A total of 39 breeds were represented. The most common breeds were: English cocker spaniel (12.4%), poodle (10.3%) and Labrador retriever (9.3%). Mixed breed dogs represented 13.1% of the total. The upper eyelids were most commonly affected (65.2%), males and females were equally represented and there did not appear to be a predilection for either side of the face. Mitotic figures were most common in epitheliomas. The pigmented subtype was the most common form of epithelioma (59.7%). Whereas within the adenomas, the classic subtype (without inflammation or pigmentation) was the most common form (61.7%); and the inflamed subtype was also highly represented (20.0%).

Multicentric lymphoma in a giant anteater (Myrmecophaga tridactyla).

Neoplastic disease is not well documented in giant anteaters. This report describes a disseminated lymphoma in an adult male giant anteater (Myrmecophaga tridactyla) from the City Zoo of Curitiba, State of Paraná, Brazil. No clinical signs were noticed before its death, except for a slight inappetence. At postmortem examination, pale white to yellow, variably sized nodules infiltrated the heart, liver, and intestinal lymph nodes. Histologically, two distinct cell populations were present in the nodular lesions: one characterized by smaller cells, primarily lymphocytic in nature, and another characterized by larger rounded cells with loose chromatin and frequently indented nuclei resembling histiocytes. Giant binucleated cells were occasionally observed. Mitotic figures numbered 2-3 mitotic figures/x400 field. Both cellular populations presented with moderate pleomorphism, large nuclei, a high nucleus-to-cytoplasm ratio, distinct nucleoli, and coarse nuclear chromatin. The neoplasia was classified as a form of multicentric lymphohistiocytic lymphoma (Rappaport Classification) and as an intermediate grade lymphoma (National Cancer Institute Working Formulation).

Laceraçäo completa do esfíncter anal secundária à bestialidade / Complete anal sphincter laceration secondary to bestiality

Descriçäo de um caso de laceraçäo completa do esfíncter anal secundária à bestialidade. Um homossexual apresentou laceraçäo completa do esfíncter anal devido à relaçäo sexual com um cäo de 79 kg de peso. O paciente referiu que o pênis do cäo ficou preso travou no seu ânus e que a laceraçäo ocorreu quando o cäo puxou com muita força o seu pênis para fora. Engorgitamento intenso do pênis do cäo pode causar travamento do mesmo dentro do ânus durante relaçäo sexual com o ser humano e pode ser uma causa rara de laceraçäo anal