TITLE:
A minor perimesencephalic subarachnoid hemorrhage on CT changes
AUTHORS:
Yeting Zhou, Daoming Tong
KEYWORDS:
Headache; Perimesencephalic Subarachnoid Hemorrhage; CT Imaging; Lumbar Puncture;
Angiography
JOURNAL NAME:
World Journal of Neuroscience,
Vol.1 No.2,
August
31,
2011
ABSTRACT: 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.