PMC3204431_01
Non-anomalous findings of head CT.
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F1
C virus test were negative. Cerebral computed tomography (CT) scan was normal (Fig. 1).
Diffused high-density video in the bilateral subarachnoid space on repeat head CT seven days later.
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F2
However, seven days later, his headache became more and more serious and the second cerebral CT presented SAH (Fig. 2), but there was no remarkable finding on neurological examination.
DSA showed unremarkable in the bilateral internal carotid artery (ICA) (A: right, B: left)
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F3
However, the result of DSA was unremarkable (Fig. 3A and B).