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Updated: Mar 10, 2026

Pre-Chiasmatic, Single Injection of Autologous Blood to Induce Experimental Subarachnoid Hemorrhage in a Rat Model
Published on: June 18, 2021
Atypical case of perimesencephalic subarachnoid hemorrhage
Konark Malhotra1,2, Shino D Magaki3, Maria Inmaculada Cobos Sillero3
1Department of Neurology, University of California, Los Angeles, USA.
Abstract:
Perimesencephalic subarachnoid hemorrhage (PM-SAH) refers to intracranial hemorrhage located in the perimesencephalic cistern. The etiology remains mainly unclear, although venous leakage or rupture has been postulated. We report an interesting case of a 57-year-old healthy man who presented initially with PM-SAH with worsening of subcortical lesions on follow-up neuroimaging. Histopathological examination demonstrated cerebral amyloid angiopathy with perivascular inflammation.

