pleomorphic xanthoastrocytoma

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ple·o·mor·phic xan·tho·as·tro·cy·to·ma

a rare variant of astrocytoma usually presenting early in life with seizures. The tumor is superficially located and composed of pleomorphic glial cells, lipidized astrocytes, and perivascular lymphocytes.
Synonym(s): xanthoastrocytoma
Farlex Partner Medical Dictionary © Farlex 2012

pleomorphic xanthoastrocytoma

(zan″thō-as″trŏ-sī-tō′mă) [ xantho- + astrocytoma],


A rare, relatively slow-growing astrocytoma composed of cells of many sizes and shapes. The tumor is usually diagnosed in adolescents and young adults. Microscopic specimens often reveal fatty cells, fibrillar cells, and involvement of the leptomeninges of the brain.
Medical Dictionary, © 2009 Farlex and Partners
References in periodicals archive ?
Pleomorphic xanthoastrocytoma (PXA) is rare primary neoplasm of brain.
These tumours mostly originate from malignant transformation of PXA in about 9-20%, but very rarely can arise de novo described as primary APXA [7].
(30) Activating BRAF V600E mutations have been noted in a large portion of PXAs as well as a significant minority of gangliogliomas, PAs, and DNETs.
In 1993, the World Health Organization recognized PXA as a distinct tumour in classification of grade II tumours.2
ED optics provide the best color fidelity and contrast, fully multi-coated, PXA phase correction and silver metallic prism coatings.
Agilent Technologies Inc has announced that its high-performance PXA signal analyser now supports up to 900 MHz of intermediate-frequency bandwidth, enabling it to act as a broadband down converter for analysis of wideband communications and radar signals in aerospace and defence applications.
The large-signal test system consists of Agilent E438C ESG Vector Signal Generator, Agilent N9030A PXA Signal Analyzer, and a 30dB attenuator.
(58) Album, Manning papers photograph and sketch PXA 602 no.
Features of the new Signal Studio and 89600B VSA software include: FDD and TDD per 3GPP Release 10 for both uplink and downlink signal configurations; carrier aggregation for both contiguous and non-contiguous component carrier configurations for up to 100 MHz I/Q bandwidth using Agilent's MXG vector signal generators and up to 140 MHz analysis bandwidth with the Agilent PXA signal analyzer.
The computer accelerates real-time data capture with an industry-leading PXA 320 806 MHz processor running Windows Mobile 6.5 or Windows CE 6.0.