RESUMO
A 12-year-old spayed English pointer dog developed multiple skin lesions including pigmented viral plaques, basal cell carcinomas, squamous cell carcinomas and trichoblastomas. Canine papillomavirus type 3 was detected in multiple lesions suggesting common aetiology.
Un Pointer anglais de 12 ans a développé de multiples lésions cutanées dont des plaques virales pigmentées, des carcinomes baso-cellulaires, des carcinomes épidermoïdes et des trichoblastomes. Un papillomavirus canin de type 3 a été détecté dans plusieurs lésions, suggérant une étiologie commune.
Uma cadela pointer inglês castrada de 12 anos de idade desenvolveu múltiplas lesões de pele, incluindo placas virais pigmentadas, carcinomas de células basais, carcinomas de células escamosas e tricoblastomas. O vírus do papiloma canino tipo 3 foi detectado em múltiplas lesões, sugerindo etiologia comum.
Un perro de raza Pointer Inglés esterilizado de 12 años desarrolló múltiples lesiones cutáneas, incluidas placas virales pigmentadas, carcinomas de células basales, carcinomas de células escamosas y tricoblastomas. Se detectó virus del papiloma canino tipo 3 en múltiples lesiones, lo que sugiere una etiología común.
Assuntos
Carcinoma de Células Escamosas , Doenças do Cão , Infecções por Papillomavirus , Neoplasias Cutâneas , Animais , Carcinoma de Células Escamosas/veterinária , Doenças do Cão/diagnóstico , Cães , Papillomaviridae , Infecções por Papillomavirus/complicações , Infecções por Papillomavirus/veterinária , Neoplasias Cutâneas/veterináriaRESUMO
A case of malignant melanoma in a 7-year-old, intact, black, male Huacaya alpaca with a history of a chronic, nonhealing wound involving the left external nostril, weight loss, and inappetence is described. Malignant melanoma was diagnosed by histology of punch biopsy specimens from a mass on the maxilla associated with the nonhealing wound and from a mass in the submandibular region. The alpaca was humanely euthanized 10 days after the diagnosis on the basis of the poor prognosis and rapid clinical deterioration. At postmortem examination, the alpaca had an ulcerated, multilobulated, black pigmented mass (8.0 cm x 6.0 cm x 4.0 cm) that infiltrated the left rostral maxilla extending into the marrow space and into the left nasal cavity. Numerous, discrete, coalescing masses were present in the subcutaneous tissue of the submandibular area, peritracheal connective tissue, pericardium, and diaphragmatic parietal pleura and were disseminated throughout the pulmonary parenchyma. The masses were diffusely black on cut surface and exuded black pigment. Histologically, all masses were composed of spindloid to polygonal cells with indistinct cell borders and moderate amounts of cytoplasm that contained abundant fine, black granules (melanin), confirming metastasis of a primary mucocutaneous melanoma. To the authors' knowledge, this is the first report of a malignant melanoma involving bone in a New World camelid.
