Some unusual manifestations of cerebral aneurysms

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      Six cases of cerebral aneurysms which were diagnostic problems are presented and discussed. Bizarre symptom complexes and unusual background situations contributed to the diagnostic difficulties.
      Some patients exhibited backgrounds of cardiac and vascular disease and blood coagulation defects. Two separate episodes with different symptoms were present in other cases. Unusual symptoms were dependent on unusual size and location of the aneurysms. Acute psychotic episodes without meningeal signs were present in two patients with subarachnoid bleeding. Incomplete arteriography was another diagnostic pitfall.
      The diagnosis of aneurysm should be considered prominently in all instances of subarachnoid hemorrhage and in cases suggesting a mass at the base of the brain.
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