Basal rupture of saccular aneurysm

A pathological case report

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✓ In a case of subarachnoid hemorrhage, the arteries of the circle of Willis were left undisturbed and undissected at postmortem examination. A block of frontal lobe tissue with the attached vessels was serially sectioned disclosing in its entirety a saccular aneurysm that had ruptured at the base rather than the dome. The histology of the hemostatic process was clearly depicted.

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Address reprint requests to: C. Miller Fisher, M.D., Department of Neurology, Massachusetts General Hospital, Fruit Street, Boston, Massachusetts 02114.

© AANS, except where prohibited by US copyright law.

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    Diagram of the aneurysm.

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    Section of the aneurysm (AN) showing the intact wall and cap of connective tissue at the dome. Arrow indicates site of rupture. ACA = anterior communicating artery. PTAH, × 15.

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    Site of rupture with fibrin-filled gap and adjacent subarachnoid blood. This section lies in frontal plane 250 µ posterior to that shown in Fig. 2. ACA = anterior cerebral artery. AN = aneurysm PTAH. × 15.

References

1.

Crawford T: Some observations on the pathogenesis and natural history of intracranial aneurysms. J Neurol Neurosurg Psychiatr 22:2592661959Crawford T: Some observations on the pathogenesis and natural history of intracranial aneurysms. J Neurol Neurosurg Psychiatr 22:259–266 1959

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