Fig. 1

Axial CT images at the high parietal region, plain (1a) and contrasted (1b) showing; 1a – left high parietal region cerebral edema is present, with no evidence of haemorrhage. 1b – Contrast is seen opacifying the sulci, but otherwise no additional findings were evident. Axial MRI images; GRE (1c), pre-contrast FLAIR (1d), and T2 FLAIR post gadolinium (1e), sequences at the high parietal region showing; 1c – Hypointense signal of the affected region (arrows) with corresponding hyperintensity on FLAIR (1d) confirming acute convexal SAH. 1e – Areas of pachy- and leptomeningeal enhancement, with small foci of haemorrhage; indirect signs of vasculitis