This microscopic image <image 1>
['shows the typical pattern of a subependymoma', 'is benign and slow growing', 'commonly intraventricular', 'all are correct']
The photomicrograph illustrates a hypocellular lesion containing abundant fibrillar matrix, clusters of round to oval bland nuclei, and microcystic spaces typical of subependymoma. Subependymomas are benign slow growing low-grade (WHO grade I) glial neoplasms that typically arise within the ventricle or subventricular region. The lesions are typically found in the middle aged to elderly population. Subependymomas are often incidental findings but can present with symptoms of increased intracranial pressure due to obstructive hydrocephalus. (Prayson, Neuropathology, 2005, 476-477)