Astrocitoma gemistocítico em um cão jovem.

Abstract

Astrocytoma is the most common tumor of the central nervous system in domestic animals, and the dogs are the most commonly diagnosed species. Among the classification of astrocytic tumors, gemistocytic tumors are the least common and are classified as low malignancy. The objetive of this report is to describe a case of gemistocytic astrocytoma in a female dog, Pinscher, two years and eleven months old, who was presented for clinical care with neurological symptoms. Clinically, the animal presented intense and generalized tremors, spasticity of the pelvic and thoracic limbs, seizure, difficulty in swallowing and bilateral light-responsive mydriasis. The animal died seven days after the initial care and was referred for necropsy where macroscopic evaluation was performed. Histopathological evaluation was gemistocytic astrocytoma and confirmed by positive immunostaining of astrocytes by the vimentin antibody by immunohistochemistry. It is concluded that the clinical signs are nonspecific, that it may not present macroscopic aspects. Histopathological examination is required for diagnosis and immunohistochemical evaluation for confirmation.