[Glomus jugulare tumor with intra- and extracranial extension: a case report with MRI study].

: A case of glomus jugulare tumor with intra- and extracranial extension is described. The patient was a 63-year-old woman who complained of gait and memory disturbances. On admission neurological examination revealed recent memory disturbance, left deafness, left XI, XIIth cranial nerve palsies, and slight ataxic gait. Roentgenogram of the skull showed an enlarged left jugular foramen with bone erosion. Plain X-ray computerized tomography scan (X-CT) indicated obstructive hydrocephalus and X-CT with contrast enhancement revealed a mass lesion in the left posterior cranial fossa extending through enlarged left jugular foramen to the extracranial space toward the level of C2. Cerebral angiography demonstrated a large mass with blood supply from branches of left external carotid and vertebral arteries. The tumor stain was not remarkable. Left internal jugular vein was completely obstructed at the level of the second cervical vertebral body. Magnetic resonance imaging (MRI) clearly showed the tumor extending from the anterolateral portion to the second cervical vertebral body through the enlarged jugular foramen to the posterior cranial fossa. Brain stem and cerebellar hemisphere which were markedly compressed by the mass were clearly visualized. At first a ventriculo-peritoneal shunt was made and four weeks later subtotal removal of the tumor was undertaken. Histopathology of tumor specimen showed typical glomus jugulare tumor. MRI was considered to be very useful for the diagnosis and treatment of the glomus jugulare tumor with intra- and extracranial extension.