Myxoid Meningiomas of the Rostral Cervical Spinal Cord and Caudal Fossa in Four Dogs

Reports of neoplasms of the spinal cord, meninges, and surrounding tissues in the dog are rare. Primary spinal meningeal tumors reported in the dog include meningeal sarcomas, lymphoma, typical meningiomas similar to those seen in the cranial cavity, and an atypical histiocytic meningioma in the midcervical area. There are also several reports of meningeal and vertebral involvement with nerve sheath tumors (Schwannomas, neurilemmomas, neurofibrosarcomas), malignant histiocytosis, primary bone sarcomas, and metastatic neoplasms. We report on four dogs with primary meningeal neoplasms of the dorsal rostral cervical spinal cord and caudal fossa that are morphologically distinct from the previously reported tumors of the meninges in the dog.