[Ruptured intracranial aneurysms. Autopsy studies from two pathological institutes (author's transl)].

Among 67,930 autopsies 233 (0.3%) ruptured unoperated intracranial aneurysms were found. 105 aneurysms belonged to the anterior, 89 to the middle, and 29 to the posterior groups. The size, age and sex distribution of the aneurysms as well as the lesions due to their rupture were studied. The following complications were found (table 4): Massive subarachnoid haemorrhages (77%), intracerebral haematomas (61%), massive intraventricular haemorrhages (35%). Intracranial aneurysms were combined with polycystic degeneration of the kidneys in 8 patients. The pathomorphological findings were compared with the clinical diagnoses. The clinical diagnosis of a ruptured intracranial aneurysm was established in 13.9% of the patients only.