Rupture of a berry aneurysm of the Circle of Willis would likely produce hemorrhage into the
Correct Answer: Subarachnoid space
Description: Subarachnoid hemorrhage is much less common than hypeensive intracerebral hemorrhage, and most often it results from rupture of a berry aneurysm. Berry aneurysms are saccular aneurysms that result from congenital defects in the media of aeries. They are typically located at the bifurcations of aeries. They are not the result of atherosclerosis. Instead, berry aneurysms are called congenital, although the aneurysm itself is not present at bih. Berry aneurysms are most commonly found in the circle of Willis, typically either at the junction of the anterior communicating aery with the anterior cerebral aery or at the junction of the middle cerebral aery and the posterior communicating aery. The chance of rupture of berry aneurysms increases with age (rupture is rare in childhood). Rupture causes marked bleeding into the subarachnoid space and produces severe headaches, typically described as the "worst headache ever." Additional symptoms include vomiting, pain and stiffness of the neck (due to meningeal irritation caused by the blood), and papilledema. Death may follow rapidly. Ref - Harrison's internal medicine 20e pg 2073, 2084-2085
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