Abstract
Purpose
Non-aneurysmal perimesencephalic subarachnoid hemorrhage (PmSAH) represents 6.8% of spontaneous subarachnoid hemorrhage, and usually has a benign clinical course. However, patients might have early cerebral ischemic lesions and long-term neurocognitive complaints. Cerebral atrophy has been described in patients after aneurysmal SAH, but not in PmSAH. We aimed to investigate if PmSAH associates with increased brain volume loss.
Methods
In this prospective study, we included consecutive patients with PmSAH that performed MR in the first 10 days after hemorrhage, and follow-up MR 6–7 years later. Automated volumetric measurements of intracranial, white matter, gray matter, whole brain, lateral ventricles, hippocampus, and amygdala volumes were performed. Volumes were compared to a normal population, matched for age.
Results
Eight patients with PmSAH were included, with a mean age of 51.5 (SE 3.6) at baseline. The control group included 22 patients with a mean age of 56.3 (SE 2.0). A relative reduction of all volumes was found in both groups; however, PmSAH patients had significant reductions in intracranial, white and gray matter, whole brain, and hippocampal volumes when compared to controls. These changes had a higher magnitude in whole brain volume, with a significant absolute decrease of 6.5% in PmSAH patients (versus 1.9% in controls), and a trend for an increase in lateral ventricle volume (absolute 21.3% increase, versus 3.9% in controls).
Conclusion
Our cohort of PmSAH patients showed significant long-term parenchymal atrophy, and higher global and focal parenchymal volume loss rates when compared to a non-SAH population.
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Abbreviations
- PmSAH:
-
Non-aneurysmal perimesencephalic subarachnoid hemorrhage
- SAH:
-
Subarachnoid hemorrhage
- ICC:
-
Intracranial cavity
- WM:
-
White matter
- GM:
-
Gray matter
- CSF:
-
Cerebrospinal fluid
- GCS:
-
Glasgow coma score
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Gama Lobo, G., Fragata, I. Long-term global and focal cerebral atrophy in perimesencephalic subarachnoid hemorrhage—a case–control study. Neuroradiology 64, 669–674 (2022). https://doi.org/10.1007/s00234-021-02804-w
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DOI: https://doi.org/10.1007/s00234-021-02804-w