6) We present a rare case report of a subependymoma at the foramen of Monro presenting with intermittent hydrocephalus.
Intraoperative frozen section analysis revealed likely diagnosis of subependymoma.
In the past, various cell types proposed to be the cell of origin for subependymomas have included ependymal glial precursor cell, astrocytes from the subependymoma plate, or a combination of the two.
1, 5-6, 8) Newer management techniques including endoscopic biopsy or resection and adjuvant stereotactic radiosurgery have been described for other intraventricular tumors; (15) however, their utility for subependymoma is not yet clear.
Our case illustrates the first reported case of intermittent hydrocephalus due to a subependymoma at the foramen of Monro.
Subependymoma revisited: clinicopathological evaluation of 83 cases.
Massive symptomatic subependymoma of the lateral ventricles: case report and review of the literature.
Other less common posterior fossa tumours include dermoid (fat-containing lesion), arachnoid cyst (CSF intensity in all sequences), glomus jugulare, chordoma, atypical teratoid/rhabdoid tumour, subependymoma
, solitary fibrous tumour, lymphoma, dysplastic cerebellar gangliocytoma (Lhermitte-Duclos Disease) and ganglioglioma.
The differential considerations for both studies included ependymoma, subependymoma
, neurocytoma, giant cell astrocytoma, and metastasis.
Given the epithelial nature of the current lesion, multiple entities are eliminated, including melanoma, melanocytoma, pigmented astrocytoma, and subependymoma
calcify in approximately one third of cases and usually demonstrate small foci of calcification.