Hippocampal calcification and its effects on cognitive function and symptoms in dementia.

Background: Hippocampal calcification (HC), highly prevalent in older people, has not attracted attention until recently. Despite its potential effects on cognition and behaviour, and its possible impact on the diagnosis and severity of dementia, it has not been investigated. This study aimed to evaluate the prevalence of HC and its influence on cognition and behavioural symptoms in patients with dementia.

Gamma knife thalamotomy for Parkinson disease and essential tremor: a prospective multicenter study.

Background: No prospective study of gamma knife thalamotomy for intractable tremor has previously been reported.

Objective: To clarify the safety and optimally effective conditions for performing unilateral gamma knife (GK) thalamotomy for tremors of Parkinson disease (PD) and essential tremor (ET), a systematic postirradiation 24-month follow-up study was conducted at 6 institutions. We present the results of this multicenter collaborative trial.

An intracranial pseudoaneurysm in the distal middle cerebral artery in a child.

Intracranial pseudoaneurysms are rare, particularly in children and adolescents. They are characterized by the presence of organizing hematoma and fibrosis without true vascular elements. Most pseudoaneurysms result from events such as major trauma or infectious illness, and the development of pseudoaneurysm without a preceding incident is rare.

Cerebral mature teratoma with malignant transformation in a 52-year-old man: a case report.

A case of adult teratoma with malignant transformation in a 52-year-old male is reported. We describe characteristic CT, histopathologic features and histogenesis of the tumor. Gradual onset of cerebral signs and symptoms was considered to be due to the tumor originating from the silent area of the frontal lobe of the brain and possessing a slowly progressive growth character.