case_images: PMC8492438_01
case_images: (a) Non-contrast computed tomography (CT) shows a massive cerebellar hematoma with slightly obstructive hydrocephalus. (b) CT angiography did not show apparent arteriovenous malformation or a cerebral aneurysm.
case_images: SNI-12-448-g001.jpg
case_images: PMC8492438_01_SNI-12-448-g001.jpg
case_images: F1
case_images: Brain computed tomography (CT) revealed a cerebellar hemorrhage 5 cm in size with slight obstructive hydrocephalus [Figure 1a]. AVM or a cerebral aneurysm [Figure 1b]. An emergent surgery was performed to evacuate the hematoma, and a piece of yellowish, soft tissue was obtained from the cavity wall during evacuation.
case_images: Histopathological examination of the specimen. (a) Hematoxylin-eosin (HE) staining shows a biphasic pattern with varying proportions of piloid areas alternating with spongy areas with high vascularity. (b) Bipolar neoplastic cells with elongated hair-like processes (black arrow) and oligodendroglioma-like cells with cytoplasmic vacuoles (arrowhead). (c) Glomeruloid-like vascular proliferation (white arrows) is visible.
case_images: SNI-12-448-g002.jpg
case_images: PMC8492438_01_SNI-12-448-g002.jpg
case_images: F2
case_images: Pathological examination revealed a PA [Figure 2].
case_images: (a) Postoperative fluid-attenuated inversion recovery shows high intensity in the right middle cerebellar peduncle, cerebellar hemisphere, and dorsal midbrain (arrow). (b) Gadolinium-enhanced MRI shows no residual lesion.
case_images: SNI-12-448-g003.jpg
case_images: PMC8492438_01_SNI-12-448-g003.jpg
case_images: F3
case_images: The patient recovered to a modified Rankin scale score of 2, 6 months after onset, and she was followed with MRI [Figures 3a and b] without additional treatment.