A 33-year-old male asked:
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what is the definition or description of: subarachnoid hemorrhage?

1 doctor answer
Dr. Joseph Marra
28 years experience Radiology
Bleed around brain: When blood is seen in the subarachnoid space surrounding the brain, it is termed a subarachnoid hemorrhage. Blood in this area is most commonly seen on CT or MRI imaging of the head. The biggest concern would be the possibility of bleeding due to an aneurysm, although blood due to trauma is more common. In some cases where SAH is suspected, but not seen on CT scan; a lumbar puncture may detect.
Answered on Jun 12, 2017

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Dr. James Goodrich
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CT or MR : Ct scan or mr to document a sah and then either an angiogram or ct angio or mr angio to look for a vascular malformation such as an aneurysms or avm.
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