The CT appearance of intracranial aneurysms has been well described. Though a definitive diagnosis often requires angiography, the CT findings are often highly suggestive of these frequent , potentially lethal, and curable vascular lesions. We recently encountered a patient who had the typical CT findings of intracranial aneurysm but whose arteriographic findings showed a large azygos anterior ...

Five patients with kissing aneurysms (adherent internal carotid-posterior communicating artery and ipsilateral internal carotid-anterior choroidal artery aneurysms) are reported. There was female predominance and the subarachnoid hemorrhage was commonly due to rupture of the proximal posterior communicating artery aneurysm. Despite the demonstration of angiographic cleavage, the two aneurysms a...

The performance of transcranial Doppler in the detection of anterior cerebral artery vasospasm and vasospasm in patients after subarachnoid haemorrhage was analysed. Transcranial Doppler and cerebral angiography were performed within the same 24 hours on each of 41 patients with acute subarachnoid haemorrhage. Sensitivity and specificity of transcranial Doppler to classify middle cerebral arter...

Variations in the circle of Willis was studied using Magnetic Resonance Imaging Angiography in fifty patients of South Indian population at random. Variations have been found in 16 cases. All arteries in the circle of Willis showed variations except the anterior communicating artery, 5 cases showed variations in the anterior cerebral artery, 6 cases in the internal carotid artery, 2 cases in th...

Diabetes insipidus without perception of thirst, as may follow an anterior communicating artery aneurysm, requires prescription of fluid intake as well as desmopressin. The management goal of maintaining a normal serum sodium is rendered more challenging in a humid subtropical environment, where insensible losses are higher.

The structure and variations of the circle of Willis in 55 days were studied from corrosion-cast specimens. The perivascular sympathetic innervation of the circle was also investigated in 9 dogs using the Schultz silver impregnation method. The following results were obtained. 1) The circle was entirely closed in all specimens. 2) The basic shape and variations of the circle were briefly as fol...