Cerebellar low-grade oligoastrocytoma presenting with subarachnoid haemorrhage.
Subarachnoid haemorrhage (SAH) associated with intra-axial tumours is extremely     uncommon and is usually seen in association with intratumoural bleed. Tumours     located near the ventricle or subarachnoid spaces have a higher propensity for     SAH compared to intraparenchymal lesions. Low-grade tumours rarely demonstrate     any evidence of bleed on imaging. Oligoastrocytomas of the posterior fossa are     rare tumours in adults and their presentation with intratumoural haemorrhage and     SAH is unknown. We report a unique case of cerebellar low-grade oligoastrocytoma     that mimicked a tentorial-based extraaxial lesion on imaging and presented with     SAH. Susceptibility-weighted magnetic resonance imaging is a useful imaging     modality to demonstrate blood within and outside the tumour.
Sree Chitra Tirunal Institute for Medical Sciences and Technology, Department of Neurosurgery, Trivandrum, Kerala, India. doc_gopal@yahoo.com
Gopalakrishnan
G
Viswanathan
Suresh
S
Nair
Kesavadas
K
Chandrasekhar
Radhakrishnan
R
Vishnupuri
D000328:Adult; D001254:Astrocytoma / Q000150:complications / Q000175:diagnosis* / Q000601:surgery; D001706:Biopsy; D001932:Brain Neoplasms / Q000150:complications / Q000175:diagnosis* / Q000601:surgery; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D013345:Subarachnoid Hemorrhage / Q000175:diagnosis* / Q000209:etiology / Q000601:surgery; D014057:Tomography, X-Ray Computed