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A minor perimesencephalic subarachnoid hemorrhage on CT changes

Author(s): Yeting Zhou | Daoming Tong

Journal: World Journal of Neuroscience
ISSN 2162-2000

Volume: 01;
Issue: 02;
Start page: 28;
Date: 2011;
Original page

Keywords: Headache | Perimesencephalic Subarachnoid Hemorrhage | CT Imaging | Lumbar Puncture | Angiography

Despite the increasing number of reports of patients with perimesencephalic subarachnoid hemorrhage (PMSAH), a minor or atypical PMSAH on CT changes has not been reported. We present the first described case of a minor subarachnoid hemorrhage located in the right perimesencephalic cistern on CT 4 h after headache onset. Twenty-six hours after headache on-set, another CT of the head showed that blood dis-persion. On the third day in hospital, examination of cerebrospinal fluid revealed xanthochromia. Minor PMSAH is rare type of SAH, and can been missed if there is a delay in CT imaging of the head. Any pa-tient with a suspected minor PMSAH or equivocal results on CT should undergo routine lumbar punc-ture.
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