Hemorrhagic stroke etiologies

(A) Lateral view of conventional cerebral angiogram demonstrating an extensive left parieto-occipital AVM (arrows) with feeding vessels from the left posterior cerebral, middle cerebral, and anterior cerebral arteries with early deep and superficial draining veins.
(B) Axial T2/FLAIR (B, left panel) and susceptibility-weighted (B, right panel) MRI sequences showing a left frontal cavernous malformation (arrows) with calcified components within the lesion (hyperintense punctate signals in (B, left panel) and increased susceptibility (B, right panel) consistent with blood products.
(C) Coronal views of a CT angiography (C, left panel) and conventional cerebral angiogram (C, right panel) demonstrating an irregular fusiform lobulated aneurysm of the mid-basilar artery (arrowheads).
(D) Sagittal (D, left panel) and axial (D, right panel) T2/FLAIR-weighted MRI sequence of a patient with a large pontine IPH (arrowheads) with associated IVH from a posterior fossa primitive neuroectodermal tumor.