Pilomyxoid astrocytoma of the fourth ventricle in an adult.
case_report · Level V
Where this comes from
- Record sourced from PubMed, PMID 18958385.
- Also identified by DOI 10.1007/s00701-008-0032-4.
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Abstract
Pilomyxoid astrocytomas have been identified as a variant of pilocytic astrocytoma. They are listed as a novel clinico-pathological entity in the 2007 World Health Organisation (WHO) classification of tumours of the central nervous system. This tumour corresponds to a WHO grade II neoplasm whereas pilocytic astrocytoma corresponds to WHO grade I. We have encountered an infratentorial tumour with pilomyxoid features in an adult. A 25 year old man presented with tinnitus and hyperacusis. Brain MRI revealed a mass occupying the fourth ventricle. We performed partial resection, but no adjuvant therapy was given. The staining index for the anti-Ki-67 monoclonal antibody MIB-1 was less than 1% in this patient. Pilomyxoid astrocytomas are not limited to the hypothalamic/chiasmatic region in children. Additional knowledge and recognition of this entity is necessary to improve treatment of pilomyxoid astrocytoma.
Medical subject headings
- Astrocytoma
- Cerebral Ventricle Neoplasms
- Fourth Ventricle