The likelihood of rupture of unruptured intracranial aneurysms that were less than 10 mm in diameter was exceedingly low among patients in group 1 and was substantially higher among those in group 2. The risk of morbidity and mortality related to surgery greatly exceeded the 7.5-year risk of rupture among patients in group 1 with unruptured intracranial aneurysms smaller than 10 mm in diameter.

Six patients with epilepsy were found to have intracranial aneurysms, mainly in the middle cerebral territory. The mechanism of production of these presenting symptoms is considered to be a minor haemorrhage with localized destruction of brain, or calcification in the aneurysmal wall behaving as a hamartoma. In the differential diagnosis of factors causing epileptic attacks, an intracranial aneurysm should be considered, and its presence should be excluded by angiography before any blind surgical procedure for epilepsy is undertaken.

Intravascular papillary endothelial hyperplasia (IPEH) is a rare benign reactive lesion usually found in thrombosed subcutaneous blood vessels. It uncommonly occurs in the central nervous system and may be mistaken for a more malignant type of tumour such as angiosarcoma. We present a first case of multiple IPEH occurring intracranially in a 51-year-old woman. She developed neurological compromises secondary to the mass affect of the haematoma arising from one of the lesions. Prompt surgical evacuation of the haematoma stabilized her condition. Surgical treatment, pathological findings, radiographic characteristics, and a review of the literature are presented.

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The authors report their experience with the use of epsilon aminocaproic acid (EACA) in the preoperative management of a series of patients with ruptured intracranial aneurysms. A similar series of patients was taken as control. They found that EACA is of definite value in preventing recurrent hemorrhage in the preoperative period. The significance of antifibrinolytic therapy in ruptured intracranial aneurysms is discussed.