[A Case of Juvenile Cerebral Infarction due to Reversible Cerebral Vasoconstriction Syndrome].

A 19-year-old woman had a thunderclap headache, followed by left hemiparesis and left homonymous hemianopsia. Laboratory tests showed no signs of infection and immunological test results were unremarkable. MRI revealed a cerebral infarction in the right posterior cerebral artery territory, and digital subtraction angiography(DSA)showed right posterior cerebral artery stenosis on day 2.

[Acute Subdural Hematoma in Snowboarders:A Multivariate Analysis of 79 Cases].

Snowboarding-related head injuries have become less common as the number of snowboarders has decreased;however, severe head injuries, such as acute subdural hematomas, occur every snowboarding season. We investigated the characteristics of cases of snowboarding-related acute subdural hematoma treated at our hospital. A total of 3,632 patients with snowboarding-related head injuries seen at our hospital between the 1995/96 and 2012/13 snowboarding seasons were enrolled in this study.

[Multiple and simultaneous intracranical hemorrhages with homocysteinemia].

A decreased intake of brightly colored vegetables results in increased levels of serum homocysteine, and homocysteinemia is associated with the progression of arteriosclerosis. Moreover, homocysteinemia is a known risk factor for cerebral infarction. Here, we report three cases wherein multiple simultaneous intracranial hemorrhages developed in the presence of homocysteinemia.

Differences in clinical characteristics of head injuries to snowboarders by skill level.

Background: Many reports have compared head injuries between snowboarding and skiing. However, detailed studies comparing snowboarding head injuries between beginners and intermediates/experts have been lacking.

Purpose: The authors investigated differences in clinical characteristics of head injuries to snowboarders between beginners (group B) and intermediates/experts (group IE).

[Cerebral infarction suspected due to dissection of intracranial carotid artery in 2 children].

Intracranial cerebral artery dissection in children is very rare. We report 2 children who were diagnosed as having cerebral infarction which was suspected to be due to dissection of intracranial cerebral artery. Case 1: An 11-year-old girl presented with conscious disturbance and hemiparesis after seizure.

[Bickerstaff's brainstem encephalitis with positive findings on head MRI--case report].

We report a case of Bickerstaff's brainstem encephalitis (BBE) with positive findings on head MRI. Abnormal lesions on head MRI were detected in approximately 30% cases of BBE. An 81-year-old female presented with disturbance of consciousness (Japan Coma Scale 200), ophthalmoplegia (downward deviation) and tetraplegia.

Recurrent intracranial solitary fibrous tumor initially diagnosed as hemangiopericytoma.

We describe a case of an intracranial solitary fibrous tumor that recurred three times consecutively in an 11-year period. A 72-year-old man presented with a headache and gait disturbance. Magnetic resonance imaging (MRI) revealed a dumbbell tumor at the left tentorium.

Characteristics of helmet or knit cap use in head injury of snowboarders.

The rate of head injury is 1.86-6 times higher for snowboarding than for skiing. Detailed data about the usefulness of a helmet or knit cap for protecting against serious head injuries have not been reported.

Clinical investigation of acute spontaneous subdural hematoma cases.

Background: Acute spontaneous subdural hematomas of arterial origin without any traumatic history or vascular anomaly are rarely reported. Here, we report our series of 6 patients with acute spontaneous subdural hematoma.

Methods: All patients with acute spontaneous subdural hematoma were surgically treated at our hospital between January 1994 and December 2003.

[A case of infundibular dilatation developed into an aneurysm and rupturing after the rupture of an aneurysm 10 years ago].

A 44-year-old female with subarachnoid hemorrhage caused by the left internal carotid-posterior communicating artery aneurysm rupture was presented. At that time, carotid angiography showed the left internal carotid-posterior communicating artery aneurysm and the right internal carotid-posterior communicating artery portion infundibular dilatation. Neck clipping for left internal carotid-posterior communicating artery aneurysm was done and she was discharged from our hospital without neurological deficit.

Head injuries in snowboarders compared with head injuries in skiers. A prospective analysis of 1076 patients from 1994 to 1999 in Niigata, Japan.

We investigated snowboarding-related head injury cases and skiing-related head injury cases during five ski seasons at one resort area. There were 634 snowboarding-related head injuries and 442 skiing-related head injuries. The number of snowboarding head injuries increased rapidly over the study period.

[Diffuse cerebral artery vasospasm following total resection of posterior fossa meningioma: a case report].

Diffuse cerebral artery vasospasm following brain tumor resection is a rare complication. The authors reported a case of symptomatic diffuse cerebral artery vasospasm of early phase following resection of a left posterior fossa meningioma. A 50-year-old female patient was admitted to our hospital complaining of headache.