pilocytic astrocytoma

(redirected from Pilocytic)

pilocytic as·tro·cy·to·ma

a slowly growing astrocytoma composed histologically of elongated astrocytes; often located in the optic chiasm region of the third ventricle, hypothalamus, or cerebellum, predominantly in younger people.
Synonym(s): piloid astrocytoma

pi·lo·cyt·ic as·tro·cy·to·ma

(pī'lō-sit'ik as'trō-sī-tō'mă)
A slowly growing astrocytoma composed histologically of elongated astrocytes; often located in the optic chiasm region of the third ventricle, hypothalamus, or cerebellum, predominantly in younger individuals.

pilocytic astrocytoma

A low-grade (relatively slow growing) tumor made of supporting cells of the brain. It usually found in the cerebellum of children, in whom it causes symptoms of headache, nausea, vomiting, and difficulty with balance.
See also: astrocytoma
References in periodicals archive ?
The latter group excludes noninfiltrating astrocytomas, such as pilocytic astrocytoma, subependymal giant cell astrocytoma, and pleomorphic xanthoastrocytoma.
Embryonal/primitive neuroectodermal/medulloblastoma and pilocytic astrocytomas are the most common tumours before age 9 years, and gliomas grade I to III between 10 and 19 years are common.
The term 'glioma' includes all the tumours arises from glial cells, including grades I, pilocytic astrocytomas, pleomorphic xanthoastrocytomas, and subependymal giant cell astrocytomas, grade II oligodendrogliomas and astrocytomas, grade III anaplastic oligodendrogliomas, anaplastic astrocytomas, anaplastic oligoastrocytomas, anaplastic ependymomas and grade IV glioblastoma multiform (GBM).
According to the company, Olson is a 30-year brain tumour survivor and was diagnosed with a pilocytic astrocytoma when he was just 12-years-old.
The differential diagnosis of tanycytic ependymoma includes schwannoma and pilocytic astrocytoma, which makes the diagnosis more challenging and difficult.
Analysis of BRAF V600E mutation in 1,320 nervous system tumors reveals high mutation frequencies in pleomorphic xanthoastrocytoma, ganglioglioma and extracerebellar pilocytic astrocytoma.
WHO grade I lesions, which include pilocytic astrocytomas and gangliogliomas, while WHO grade II gliomas are well circumscribed and non-infiltrative.
Oncogenic RAF1 rearrangement and a novel BRAF mutation as alternatives to KIAA1549:BRAF fusion in activating the MAPK pathway in pilocytic astrocytoma.
Astrocytoma is the major type of CNS tumors in NF1, and pilocytic astrocytoma (WHO grade I) the main histological subtype3,4.
Kelly-Anne Adams-Fielding has pledged to become a 'fundraiser for life' for the hospital where fiveyear-old Megan is treated for Posterior Fossa Pilocytic Astrocytoma tumour, which affects her co-ordination and balance.
Among the 19 posters presented, WCM-Q student Nahel Tunio and Vignesh Shanmugan won 1st place in their categories for their respective research on Mutant Tau Propagation and Toxicity and Comparative gene expression profiling of pilocytic (Grade I) and diffuse (Grade II) astrocytomas - Identification and validation of new biomarkers .
Recent reviews of the literature by Hader, et al and Sobowale, et al revealed secondary PNETs after brain radiation for retinoblastoma, pilocytic astrocytoma, ependymoma, oligodendroglioma, and low grade astrocytomas.