Four hundred sixty-seven patients were treated for cerebral aneurysms between November 1976 and October 1990 in our hospital. Of these, six patients were diagnosed as having intracranial bacterial aneurysms. There were four cases of subarachnoid hemorrhage, one case of subdural hematoma, and one case of cerebral infarction. Of these six cases, five (83%) had a single aneurysm and only one (17%) had four aneurysms. All aneurysms existed on the peripheral side.
All the six cases had valvular disease as an underlying disease, and four of them had complications of endocarditis.
For the treatment of intracranial bacterial aneurysms, there are two types of treatment, one being surgical treatment and the other chemical treatment. From our experience with these six cases, we think it advisable, as a rule, to take surgical treatment as the first choice when the aneurysm comes from bleeding, and chemical treatment as the first choice when the aneurysm is found in an unruptured state. However, in giving treatment, it is necessary to always keep in mind the possibility of underlying heart disease.
