[Adult choroid plexus papilloma of the posterior fossa: extraventricular location].

Choroid plexus papillomas (CPPs) are rare neuroectodermal neoplasms accounting for 0.4% of all intracranial neoplasms in adults. Most of them are located in the posterior fossa in adults.

Acute epidural hematoma caused by contrecoup head injury--case report.

A 50-year-old woman presented with a rare case of contrecoup epidural hematoma (EDH) associated with coup EDH. She was hit by a car while riding a bicycle, and struck the left parietal region of her head on the ground. She was dazed for a few minutes.

Rapid regrowth of intracranial clear cell meningioma after craniotomy and gamma knife radiosurgery--case report.

A 24-year-old woman underwent craniotomy for falx meningioma (5 cm in diameter) on October 24, 1995. The deepest part of the tumor was located in the anterior horn of the lateral ventricle, which was not resected. The histology was clear cell meningioma (CCM), aggressive in nature.

Pseudoaneurysm formation at the rupture site of a middle cerebral artery aneurysm--case report.

A 42-year-old man suffered subarachnoid hemorrhage manifesting as sudden severe headache one month before admission. On admission, his headache had subsided and he had no neurological deficits. Cerebral angiography demonstrated an aneurysm originating from the bifurcation of the right middle cerebral artery.

Aneurysm of the distal posterior inferior cerebellar artery originating from the extracranial and extradural vertebral artery.

A 42-year-old woman presented with a ruptured aneurysm of the distal posterior inferior cerebellar artery (PICA), which had a rare extracranial and extradural origin. Medial suboccipital craniectomy and C-1 laminectomy were performed. The aneurysm had adhered to the right cerebellar tonsil, but was successfully clipped without difficulty.

Bilateral ophthalmic segment "kissing" aneurysms presenting with subarachnoid hemorrhage--case report.

A 31-year-old woman presented with bilateral ophthalmic segment "kissing" aneurysms causing subarachnoid hemorrhage manifesting as sudden severe headache and nausea 3 days before admission. Cerebral angiography demonstrated bilateral internal carotid-superior hypophyseal artery aneurysms, both projecting medially from the medial surface of the internal carotid arteries and appearing to touch each other. Both aneurysms had to be clipped in the same operation, because of uncertainty over which aneurysm had bled.

Gamma Knife radiosurgery for numerous brain metastases: is this a safe treatment?

Purpose: Gamma Knife (GK) radiosurgery has recently been employed in patients with numerous brain metastases (METs), even those with 10 or more lesions. However, cumulative irradiation doses to the whole brain (WB), with such treatment, have not been determined.

Methods And Materials: Since the GammaPlan ver.