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Pre-Chiasmatic, Single Injection of Autologous Blood to Induce Experimental Subarachnoid Hemorrhage in a Rat Model
Published on: June 18, 2021
Isolated acute nontraumatic cortical subarachnoid hemorrhage
V Cuvinciuc1, A Viguier, L Calviere
1Department of Neuroradiology, University Hospital, Toulouse, France.
AJNR. American Journal of Neuroradiology
|January 23, 2010
Summary
Isolated acute non-traumatic convexal subarachnoid hemorrhage (cSAH) has diverse causes beyond aneurysms. Prompt diagnosis requires considering various vascular and nonvascular pathologies, guiding appropriate imaging and treatment strategies.
Area of Science:
- Neurology
- Neuroradiology
- Vascular Neurology
Background:
- Subarachnoid hemorrhage (SAH) typically occurs in basal cisterns due to ruptured aneurysms (approx. 85% of cases).
- Isolated acute non-traumatic cSAH presents a different etiological spectrum.
- Understanding the diverse causes of cSAH is crucial for accurate diagnosis and management.
Purpose of the Study:
- To review the etiologic background of isolated acute non-traumatic cSAH.
- To highlight the range of vascular and nonvascular pathologies that can cause cSAH.
- To emphasize the importance of comprehensive diagnostic approaches for cSAH.
Main Methods:
- Review of literature on the etiologies of isolated acute non-traumatic cSAH.
- Discussion of diagnostic modalities including noninvasive imaging and conventional angiography.
- Consideration of specific conditions such as arteriovenous malformations, thrombosis, arteriopathies, PRES, CAA, and nonvascular disorders.
Main Results:
- cSAH can result from a wide array of vascular pathologies including arteriovenous malformations/fistulas, venous/dural sinus thrombosis, and various arteriopathies (RCVS, vasculitis, mycotic aneurysms, Moyamoya, severe carotid disease).
- Nonvascular causes, though rare, include PRES, cerebral amyloid angiopathy (CAA) in elderly patients, brain abscesses, and tumors.
- Diagnostic workup should include noninvasive imaging and/or conventional angiography to identify these diverse etiologies.
Conclusions:
- The etiology of isolated acute non-traumatic cSAH is broad, extending beyond aneurysms.
- A systematic approach utilizing advanced imaging is essential to detect underlying vascular and nonvascular causes.
- Timely identification of the specific cause of cSAH is critical for effective patient management.
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