Subarachnoid haemorrhage in identical twins.

Subarachnoid haemorrhage in identical twins.

A pair of identical twins both of whom died of subarachnoid haemorrhage from ruptured anterior communicating artery aneurysms are reported. These twins are compared to the three other reported twins with ruptured cerebral aneurysms.

"Twin" intracranial aneurysms causing subarachnoid haemorrhage in identical twins.

Subarachnoid Haemorrhage

SAH affects 6-9 people per 100,000 of the population per year and constitutes about 6% of first strokes. An apparent decrease from older published figures is attributed to a higher rate of CT scanning, excluding other haemorrhagic causes. Approximately 85% of patients bleed from intracranial arterial aneurysms, 10% from a non-aneurysmal peri-mesencephalic haemorrhage and 5% from other vascular ...

Subarachnoid haemorrhage.

Subarachnoid haemorrhage accounts for only 5% of strokes, but occurs at a fairly young age. Sudden headache is the cardinal feature, but patients might not report the mode of onset. CT brain scanning is normal in most patients with sudden headache, but to exclude subarachnoid haemorrhage or other serious disorders, a carefully planned lumbar puncture is also needed. Aneurysms are the cause of s...

Narcolepsy in identical twins.

Narcolepsy has been observed in chronic encephalitis, cerebral arteriosclerosis, brain tumour, and following trauma, but when these cases are excluded there remains a group without demonstrable brain pathology. The existence of this idiopathic group has been a controversial subject. Among the more impressive evidence is that suggesting a hereditary factor in idiopathic narcolepsy. To date this ...