RESUMO
Mast cell tumors are one of the most frequent skin tumors in dogs. Treatment decisions often depend on a wide range of clinical information and the main criteria for prognostic formulation are histological grade, mitotic count, Ki67 index, and KIT immunostaining pattern. NANOG is a pluripotency factor expressed by normal and cancer stem cells, which is a prognostic marker and a potential therapeutic target for several human tumors. In the present study, mast cell tumor samples from 41 dogs were evaluated for NANOG and Ki67 by immunohistochemistry. All samples were positive for NANOG but its expression was not correlated with Ki67 index and no significant differences were found with respect to histopathological grades, disease-related mortality, or survival. Our results suggest that, although related to pluripotency, NANOG expression does not correlate with proliferative activity, and is not a reliable prognostic factor for canine cutaneous mast cell tumors.
Assuntos
Doenças do Cão/patologia , Mastocitoma/veterinária , Proteína Homeobox Nanog/metabolismo , Neoplasias Cutâneas/veterinária , Animais , Biomarcadores Tumorais/metabolismo , Proliferação de Células , Doenças do Cão/diagnóstico , Doenças do Cão/metabolismo , Cães , Antígeno Ki-67/metabolismo , Masculino , Mastocitoma/diagnóstico , Mastocitoma/metabolismo , Mastocitoma/patologia , Prognóstico , Neoplasias Cutâneas/diagnóstico , Neoplasias Cutâneas/metabolismo , Neoplasias Cutâneas/patologiaRESUMO
Mast cell tumors are the most common skin cancer in dogs. They are characterized by excessive proliferation of neoplastic mast cells. The areas of higher incidence are posterior region of the animal body, scrotum and flank. The diagnosis of mastocytoma is may have the aid of imaging tests such as ultrasonography, but it is essentially based on cytology. A dog was admitted to VETCLINIC for ultrasonographic and cytological examination of the scrotal region, because it was enlarged after orchiectomy procedure. Ultrasonographic examination revealed a heterogeneous echogenic image measuring 3.93 cm by 2.76 cm, showing regular and defined contours and with evident internal vascularity in Doppler mode suggestive of inflammatory process. In cytology, the sample of low cellularity consists of individualized round cells. Round to oval nucleus presenting coarse chromatin and sometimes evident nucleoli (1-2). Moderate to large cytoplasm with intense presence of granules of pink coloration. Intense anisocytosis and anisocariasis. Background of hemorrhagic blade with marked presence of granules, being the suggestive report, being the findings compatible with mastocytoma.
Assuntos
Masculino , Animais , Cães , Escroto/diagnóstico por imagem , Escroto/fisiopatologia , Escroto/lesões , Mastocitoma/diagnóstico , Mastocitoma/diagnóstico por imagem , Mastocitoma/veterináriaRESUMO
Mast cell tumors are the most common skin cancer in dogs. They are characterized by excessive proliferation of neoplastic mast cells. The areas of higher incidence are posterior region of the animal body, scrotum and flank. The diagnosis of mastocytoma is may have the aid of imaging tests such as ultrasonography, but it is essentially based on cytology. A dog was admitted to VETCLINIC for ultrasonographic and cytological examination of the scrotal region, because it was enlarged after orchiectomy procedure. Ultrasonographic examination revealed a heterogeneous echogenic image measuring 3.93 cm by 2.76 cm, showing regular and defined contours and with evident internal vascularity in Doppler mode suggestive of inflammatory process. In cytology, the sample of low cellularity consists of individualized round cells. Round to oval nucleus presenting coarse chromatin and sometimes evident nucleoli (1-2). Moderate to large cytoplasm with intense presence of granules of pink coloration. Intense anisocytosis and anisocariasis. Background of hemorrhagic blade with marked presence of granules, being the suggestive report, being the findings compatible with mastocytoma.(AU)
Assuntos
Animais , Masculino , Cães , Mastocitoma/diagnóstico por imagem , Mastocitoma/diagnóstico , Mastocitoma/veterinária , Escroto/diagnóstico por imagem , Escroto/lesões , Escroto/fisiopatologiaRESUMO
As síndromes paraneoplásicas compreendem um grupo diverso de alterações clínicas associadas a neoplasias e ocorrem em sítios distantes do tumor primário ou de suas metástases. As neuropatias paraneoplásicas são distúrbios raros em cães, mas representam morbidade significativa e servem como importantes indicadores diagnósticos e prognósticos. O presente trabalho relata a ocorrência de dois casos de neuropatia paraneoplásica em cães com mastocitoma, considerando a apresentação clínica, o diagnóstico e as formas de tratamento utilizadas.
Paraneoplastic syndromes comprise a diverse group of clinical anomalies associated with neoplasias and occur in a location distant from the primary tumor or of your metastasis. Paraneoplastic neuropathy are rare disturbs in dogs, but represent significant morbidity and are useful as diagnostic and prognostic indicators. This work report the occurrence of two cases of paraneoplastic neuropathy in dogs with mast cell tumor, considering the clinical signs, diagnosis and treatment used.