Perimesencephalic subarachnoid haemorrhage (pmSAH)
Evidence-based neurology checklist on perimesencephalic subarachnoid haemorrhage (pmsah): Diagnostic features This is subarachnoid haemorrhage with bleeding located anterior to the midbrain There is no associated intraparenchymal or intraventricular extension There is no source of bleeding…
Diagnostic features
- This is subarachnoid haemorrhage with bleeding located anterior to the midbrain
- There is no associated intraparenchymal or intraventricular extension
- There is no source of bleeding identified on 4-vessel angiography
- The course is usually benign with a good outcome
Clinical features
Causes
Complications: re-bleeding
Complications: others
Investigations
References
- Mensing LA, Vergouwen MDI, Laban KG, et al. Perimesencephalic hemorrhage: a review of epidemiology, risk factors, presumed cause, clinical course, and outcome. Stroke 2018; 49:1363-1370.
- Pita Lobo P, Campos J, Neto L, Canhao P. Posterior cerebral artery dissecting aneurysm: another causer of perimesencephalic postern of subarachnoid hemorrhage. JNNP 2010; 82:584-585.
- van der Schaaf I, Velthuis BK, Gouw A, Rinkel GJE. Venous drainage in perimesencephalic hemorrhage. Stroke 2004; 35:1614-1618.
- Rouchaud A, Lehman VT, Murad MH, et al. Nonaneurysmal perimesencephalic hemorrhage is associated with deep cerebral venous drainage anomalies: a systematic literature review and meta-analysis. Am J Neuroradiol 2016; 37:1657-1663.
- Fu FW, Rao J, Zheng YY, et al. Perimesencephalic nonaneurysmal subarachnoid hemorrhage caused by transverse sinus thrombosis: A case report and review of literature. Medicine (Baltimore) 2017; 96(33):e7374.
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