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An ependymoma is a tumor that arises from the ependyma, a tissue of the central nervous system. Usually, in pediatric cases the location is intracranial, while in adults it is spinal. The common location of intracranial ependymomas is the floor of the fourth ventricle. Rarely, ependymomas can occur in the pelvic cavity.
The ependyma is the thin neuroepithelial (simple columnar ciliated epithelium) lining of the ventricular system of the brain and the central canal of the spinal cord. [1] The ependyma is one of the four types of neuroglia in the central nervous system (CNS).
Mainly North American pronunciation Lygon: LIG-ən / ˈ l ɪ ɡ ən / Machin: MAY-chin / ˈ m eɪ tʃ ɪ n / MacCaughey, McCaughey: like McCoy / m ə ˈ k ɔɪ / MacGrath, McGrath: mə-GRAH / m ə ˈ ɡ r ɑː / Pronunciation mainly Irish MacKay, McKay: mə-KY / m ə ˈ k aɪ / Pronunciation mainly Scottish MacLean, McLean: like McClain / m ə ...
The following table shows the 24 consonant phonemes found in most dialects of English, plus /x/, whose distribution is more limited. Fortis consonants are always voiceless, aspirated in syllable onset (except in clusters beginning with /s/ or /ʃ/), and sometimes also glottalized to an extent in syllable coda (most likely to occur with /t/, see T-glottalization), while lenis consonants are ...
The Merriam-Webster Online Dictionary suggests the first pronunciation. Similarly, this pronunciation markup guide will choose the most widely used form. NOTE: This guide is designed to be simple and easy to use. This can only be achieved by giving up scope and freedom from occasional ambiguity.
Pediatric ependymomas are similar in nature to the adult form of ependymoma in that they are thought to arise from radial glial cells lining the ventricular system.However, they differ from adult ependymomas in which genes and chromosomes are most often affected, the region of the brain they are most frequently found in, and the prognosis of the patients.
The Atlas of North American English: Phonetics, Phonology and Sound Change (abbreviated ANAE; formerly, the Phonological Atlas of North America) is a 2006 book that presents an overview of the pronunciation patterns in all the major dialect regions of the English language as spoken in urban areas of the United States and Canada.
A subependymoma is a type of brain tumor; specifically, it is a rare form of ependymal tumor. [1] They are usually in middle aged people. Earlier, they were called subependymal astrocytomas.