Six cases of bacterial intracranial aneurysm confirmed by cerebral angiographies are reported. Of which

2 cases were secondary to bacterial endocarditis(intravascular origin)

2 cases were secondasy to thrombophlebitis of the cavernous sinus (extravascular origin)2 cases had no known primary foci of infection found (cryptogenetic type).Four of the aneurysms occurred in the peripheral branches of the middle cerecral arteries had been ruptured with the formation of intracerebral hamatomas at the time of admission or during the period of hospitalization for the treatment of his acute bacterial endocarditis.These aneurysms were all excised surgically acco- mpanied by thorough evacuation of the hematomas simultaneously.The other 2 cases secondary to cavernous sinusitis were subjected to ligation of their carotid arteries.All the 6 cases had a sm- ooth postoperative course and recovered well. The pathogenesis

clinical pictures

diagnosis and management of bacterial intracranial ane- urysm are discussed.