Pilocytic astrocytoma
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MeshID = D001254Pilocytic astrocytoma, or juvenile pilocytic astrocytoma, is a brain tumor that occurs predominantly in children and involves the midline, basal, and posterior
fossa structures. It is, in general, considered abenign tumor of childhood. It is oftencystic , and, if solid, it tends to be well-circumscribed. It is characteristically a contrast-enhancing tumour by current imaging investigations (e.g.,CT scan ,MRI )Under the microscope, the tumor is viewed to be composed of bipolar cells with long "hairlike"
GFAP -positive processes. Rosenthal fibers,eosinophilic granular bodies, and microcysts are often present.It is classified as Grade 1
Astrocytoma .External links
* [http://rad.usuhs.edu/medpix/medpix.html?mode=image_finder&action=search&srchstr=astrocytoma#top Pilocytic Astrocytoma] MedPix Medical Image Database
* [http://www.med.uc.edu/neurorad/webpage/fba.html UC]
* [http://www.fightJPA.org fightJPA - An Organization Dedicated to Funding Research into Juvenile Pilocytic Astrocytoma]
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pilocytic astrocytoma — an astrocytoma resembling the fibrillary type but with its fibrils arranged in parallel rows; its grade of malignancy is low. The most common kind is the cerebellar juvenile pilocytic a. In adults the pilocytic type is usually found in the… … Medical dictionary
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