Fig. 1From: The efficacy of resection of an intradural extramedullary foramen magnum cavernous malformation presenting with repeated subarachnoid hemorrhage: a case reportAxial computed tomography demonstrating an intradural extramedullary upper cervical calcified mass lesion (a, white arrow). Axial T2-weighted magnetic resonance imaging demonstrating an intraventricular hemorrhaging (b, white arrow). Axial (c), sagittal (d) and coronal (e) T1-weighted contrast-enhanced magnetic resonance images demonstrating an intradural extramedullary mass lesion near the left C1 root which compressed the spinal cord (white arrows)Back to article page