Ependymomas are one of the more common childhood brain tumors. By the time of diagnosis, most posterior fossa ependymomas have resulted in blockage of the third or fourth ventricle and hydrocephalus, and children will typically have headaches, nausea, and vomiting. As the tumor extends, it can cause multiple cranial nerve palsies, cerebellar dysfunction, unilateral facial palsy, sensorineural hearing loss, and vestibular dysfunction. Ependymomas are believed to arise from the ependymal surface of the brain or the spinal cord.
Mar. 29, 2020