Question:

What are causes of non traumatic subarachnoid hemorrhage?
1. Cavernomas
2. Capillary telengiectaia
3. Cerebral berry aneurysms
4. Dissecting aneurysms
5. Benign perimesencephalic SAH





Answer:

The correct answers for the question "What are causes of non traumatic subarachnoid hemorrhage?" are:

3. Cerebral berry aneurysms

4. Dissecting aneurysms

5. Benign perimesencephalic SAH



Explanation
Dissecting aneurysms of the vertebro-basilar system account for 3-7% of non traumatic subarachnoid hemorrhage (SAH)). Cerebral aneurysms and benign perimesencephalic subarachnoid hemorrhage present as non traumatic SAH (options 3 and 5). Options 1 and 2 do not typically present with subarachnoid hemorrhage.



From the manuscript:
Vascular anomaly at the craniocervical junction presenting with sub arachnoid hemorrhage: Dilemma in Imaging Diagnosis, Endovascular Management and Complications
Radiology Case. 2010 May; 4(5):1-6


This article belongs to the Neuro section.




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From the manuscript

Vascular anomaly at the craniocervical junction presenting with sub arachnoid hemorrhage: Dilemma in Imaging Diagnosis, Endovascular Management and Complications

Free full text article: Vascular anomaly at the craniocervical junction presenting with sub arachnoid hemorrhage: Dilemma in Imaging Diagnosis, Endovascular Management and Complications

Abstract
We present a case of a ruptured vertebral artery dissecting aneurysm that mimicked a presumed vascular anomaly by CTA (Computerized Tomographic Angiography). A parenchymal arteriovenous malformation (AVM) or a dural arteriovenous fistula (DAVF) at the craniocervical junction can present with a subarachnoid hemorrhage and cannot be differentiated from a vertebral artery dissection by non invasive imaging. Catheter based cerebral angiography revealed a dissecting pseudoaneurysm of a diminutive right vertebral artery terminating in the posterior inferior cerebellar artery (PICA) that to our knowledge has not been previously reported. NBCA (N-Butyl Cyanoacrylate) embolization of the pseudoaneurysm lumen and sacrifice of the parent vessel resulted in cerebellar infarction, requiring an emergent decompressive craniectomy. The patient recovered to a functional neurologic status.






References



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5. Peluso J, Van Rooij W, Sluzewski M, Beute G, Mojoie C. Endovascular Treatment of Symptomatic Intradural Vertebral Dissecting Aneurysms. American Journal of Neuroradiology 2008; 29:102-106.
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1. Subarachnoid hemorrhage

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