E are relatively rare neuroepithelial tumors and account for 3-7% of all central nervous system (CNS) tumors. Among pediatric CNS tumors, ependymomas are the third most common intracranial tumor (6-14%) after juvenile pilocytic astrocytomas and primitive neuroectodermal tumors. The incidence in children is reported to be six times that in adults. Fifty percent of them occur under the age of fiv...

OBJECTIVE The objective of present study was to observe the histopathological pattern of intracranial tumors in children (< 15 yrs) and to correlate the site of lesion along with the histological diagnosis. SETTING The study included consecutive cases of intracranial tumors diagnosed in children (< 15 yrs.) in the section of histopathology at the Aga Khan University Hospital, Karachi during t...

A 72-year-old male presented with a primary hemangioblastoma of the posterior fossa with unusual dural attachment and meningeal arterial blood supply from the external carotid artery and marginal tentorial artery. Preoperative embolization facilitated complete resection of the tumor with no resultant neurological deficit. Hemangioblastoma must be included in the differential diagnosis of tumors...

Cerebrospinal fluid-borne metastases were demonstrated by metrizamide myelography in 20 children with primary intracranial tumors, posterior fossa medulloblastomas being the most common. The lumbosacral region was affected most often, with nerve root thickening, nodularity, and irregularity of the thecal sac. Cord cloaking, nodularity, and meningeal disease were common in the cervical and thora...

conclusion our results concerning cranium morphometry support the theory that hypoplastic posterior cranial fossa due to mesodermal insufficiency may play a role in the etiology of tonsillar herniation. results in individuals with tonsillar herniation, while the front-back diameter of the foramen magnum, the cerebellum height, and the sagittal diameter of the cerebellum increased, the maximum c...

MR and clinical data on 31 patients with posterior fossa CSF collections were analyzed. A clear separation of these patients into classical categories was not possible because of new information obtained from the MR images. We present a new classification of these disorders. The Dandy-Walker malformation, Dandy-Walker variant, and mega-cisterna magna seem to represent a continuum of development...

Although the association of spinal lumbosacral dysraphism and congenital spinal dermoid tumors is well known, the association of craniocervical spinal anomalies and posterior fossa dermoids has only been recognized recently. Advances in imaging technology and awareness of the association likely contribute to an increase in recently reported cases.

Cavernous hemangioma, also known as cavernous angioma, accounts for 10-20% of vascular malformations.1,2 Extra-axial lesions are rare. Most tumors are found in the sinuses, Meckel’s cavity, posterior fossa, including the cerebellarpontine angle and internal auditory meatus.3 This paper reports the clinical case of a patient with cavernous hemangioma involving the internal auditory meatus whose ...

Compared with brain tumors in adults, a much higher percentage of pediatric brain tumors arise in the posterior fossa, which includes the brain stem and cerebellum. While astrocytoma’s can be found elsewhere in the brain, the majority are found in the posterior fossa. These infratentorial astrocytoma tumors comprise as many as two thirds of all pediatric brain tumors [1]. An astrocytoma is typi...