Convexity subarachnoid haemorrhage (cSAH)
Evidence-based neurology checklist on convexity subarachnoid haemorrhage (csah): Pathology This is a non-aneurysmal SAH It accounts for about 6% of cases of SAH It is isolated to the cortical surfaces The blood volume is less than in aneurysmal SHA It does not extend into the Sylvian or…
Pathology
- This is a non-aneurysmal SAH
- It accounts for about 6% of cases of SAH
- It is isolated to the cortical surfaces
- The blood volume is less than in aneurysmal SHA
- It does not extend into the Sylvian or hemispheric fissure
- It does not involve the basal cisterns, the parenchyma or ventricles
- By contrast, aneurysmal SAH tends to occur around the Circle of Willis
Most frequent causes
Other vascular causes
Other causes
Clinical features
Radiological investigations
Cerebrospinal fluid (CSF) analysis
Potential investigations
Clinical differentials
Radiological differentials
Synonyms
References
- Ly JV, Ma H, Shaloo S, Clissold B, Phan T. Convexity subarachnoid haemorrhage: a practical guide. Pract Neurol 2023 (Online ahead of print).
- Okar S, Arat A, Arsava EM, Peker A, Berker M, Topcuoglu MA. Can convexity subarachnoid hemorrhage be caused by rupture of a saccular aneurysm? J Vasc Interv Neurol 2018; 10:1-3.
- Geraldes R, Sousa PR, Fonseca AC, et al. Nontraumatic convexity subarachnoid hemorrhage: different etiologies and outcomes. J Stroke Cerebrovasc Dis 2014; 23:e23-e30.
- Chandra RV, Leslie-Mazwi TM, Oh D, Mehta B, Yoo AJ. Extracranial internal carotid artery stenosis as a cause of cortical subarachnoid hemorrhage. AJNR Am J Neuroradiol 2011; 32:E51-E52.
- Cuvinciuc V, Viguier A, Calviere L, Raposo N, Larrue V, Cognard C, Bonneville F. Isolated acute nontraumatic cortical subarachnoid hemorrhage. AJNR 2010; 31:1355-1362.
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