Exérese de Schwanoma por meio da técnica de hemilaminectomia dorsolateral cervical cranial Schwanoma removal using the technique of cranial cervical dorsolateral hemilaminectomy

Intradural-extramedular tumors represent 50% of nervous system neoplasias. The majority of canine intradural-extramedular tumors corresponds to nervous roots neoplasias (neurofibromas, neurofibrossarcomas, schwanomas) and meningiomas. We opt for describing a schwanoma case once they are not seen routinely. This report mentions a Belgian Sheep dog, male, 8 years old, taken care of in Neurology Service of the Clinical Veterinarians Hospital of Veterinary Medicine College of Federal University of Rio Grande do Sul presenting deficit or postural reaction and hemiparesis of the right side thoracic and pelvic limbs. Mielographic examination evidenced subdural-extramedular mass existence at the right side near by the atlanto-occipital joint, compatible with neoplasia. The dog was submitted to surgical treatment using cranial cervical dorsolateral laminectomy and removal of compressive substance. Seventy-five days after the surgery the animal presented worsening signals, clinical and neurological examination had evidenced enlargement of tumor volume in comparison to the initial one. It was done partial exeresis of the tumor, however by the ending of surgical procedure the patient perished. This situation matches with literature, where only a small percentage of these tumors are completely removed and reappearance rates are high.