Figure 3

Cranial images. (A) The contrast filling the subarachnoid space with intracranial air (white arrow) and diffuse parenchymal swelling (white dotted arrow), mimicking a subarachnoid hemorrhage. (B) Subtractional magnetic resonance imaging showed no vascular malformation or intracranial hemorrhage. (C) The washed-out subarachnoid space after conservative management for one day (black arrow).