No abstract available.
Cerebellopontine Angle*

No abstract available.
Blinking* ; Cerebellopontine Angle* ; Neuroma, Acoustic*

No abstract available.
Blinking* ; Cerebellopontine Angle* ; Neuroma, Acoustic*

Trapped fourth ventricle is a rare clinical entity. It presents as a posterior fossa mass lesion. A case of trapped fourth ventricle which developed after surgery of cystic neurocysticercosis located at the cerebellopontine angle is presented. The authors reviewed the literatures of the trapped fourth ventricle and discussed the pathogenesis as well as the management of this rare clinical entity.
Cerebellopontine Angle ; Fourth Ventricle* ; Neurocysticercosis

Primary intracranial epidermoid carcinoma is an extremly rare sequela of epidermoid cysts. The authors had experienced a case of primary intracranial epidermoid carcinoma in the right cerebellopontine angle. Here, we report clinical, radiological, and histopathological features of this neoplasm with review of literatures.
Carcinoma, Squamous Cell* ; Cerebellopontine Angle ; Epidermal Cyst

About 10% of all intracranial tumors occur at the cerebellopontine angle(CPA). While the most common of these, accounting for about 75% of the total, are acoustic neurinomas, these-with widly varying histology-also comprise a significant portion. One of these is trigeminal neurinoma, which account for about 2-10% of all CPA tumors ; a cystic lesion is even rarer. The authors report a case of large cystic trigeminal neurinoma at the cerebellopontine angle and review of the pertinent literature.
Cerebellopontine Angle* ; Neurilemmoma* ; Neuroma, Acoustic ; Trigeminal Nerve

A fenestration of the vertebral artery is considered to be an unusual vascular variation that is defined as a bypass artery along the extracranial or at intracranial segment of the artery. A fenestration of the vertebral artery associated with an arteriovenous malformation at the cerebellopontine angle is extremely rare. We report a case of the ruptured arteriovenous malformation with a fenestration of vertebral artery. The embryologic genesis and clinical significance of a fenestration of the vertebral artery are discussed.
Arteries ; Arteriovenous Malformations* ; Cerebellopontine Angle* ; Vertebral Artery*

With large CPA tumors, the goal of surgery is safe total removal of the tumors and preservation of nearby neural structures. Although the suboccipital approach can be made for large CPA tumors, combined approach is more preferable method for the wide exposure of the CPA including brain stem and the lower cranial nerves. We have recently experienced favorable results by combined approach. Total removal of large tumors were obtained by these approaches. The authors present surgical points of view and a brief review of literature.
Brain Stem ; Cerebellopontine Angle ; Cranial Nerves

No abstract available.
Cerebellopontine Angle* ; Intraoperative Neurophysiological Monitoring* ; Neuroma, Acoustic*

The transpetrosal transtentorial supra- and infratentorial combined approach has been used by many skull base surgeons for the total removal of large tumors in the cerebellopontine, petroclival, and dumbbell-shaped mass of the middle and posterior cranial bases. When surgeons use the retrolabyrinthine approach for hearing preservation, adequate exposure of the presigmoid dura might be hard to achive. In order to get a wider operating field with hearing preservation, the authors used the transpetrosal approach with partial labyrinthectomy for a large dermoid cyst in the cerebellopontine angle which extened to the middle cranial base through the Meckel's cave.
Cerebellopontine Angle ; Dermoid Cyst ; Hearing* ; Skull Base