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Difference between revisions of "Astrocytoma"
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Categorization
Jensflorian (talk | contribs) (moved Diffuse midline glioma, H3 K27-altered to its new category) |
Jensflorian (talk | contribs) (Categorization) |
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An '''astrocytoma''' is a neoplasm derived from an [[neurohistology|astrocyte]]. | An '''astrocytoma''' is a neoplasm derived from an [[neurohistology|astrocyte]]. Astrocytomas are common glial tumours and grouped together with [[Oligodendroglioma]] and glioneuronal tumours in the current WHO brain tumor classficiation. Some (often circumscribed) astrocytic tumors and pediatric tumours are biologically different from adult-onset diffuse astrocytomas. An overview of CNS tumours is found in the ''[[CNS tumours]]'' article. | ||
=Categorization= | |||
Astrocytomas can be categorized in serveral ways. | |||
* Common vs. uncommon tumours. | |||
* Adult vs. pediatric tumours. | |||
* Circumscribed vs. diffusely growing astrocytomas. | |||
=Overview= | =Overview= | ||
Until 2016 WHO classification, roman numerals I-IV were used for grading. The | Until 2016 WHO classification, roman numerals I-IV were used for grading. The current 2021 WHO classification uses arabic numbering 1-4 for CNS WHO grading instead. | ||
{| class="wikitable sortable" | {| class="wikitable sortable" | ||
! Name | ! Name | ||
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|} | |} | ||
=Common= | =Common Astrocytomas= | ||
==Pilocytic astrocytoma== | ==Pilocytic astrocytoma== | ||
* Benign, cystic, infratentorial. | * Benign, cystic, infratentorial. | ||
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{{Main|Glioblastoma}} | {{Main|Glioblastoma}} | ||
=Uncommon= | =Uncommon Astrocytomas= | ||
==Diffuse astrocytoma, MYB- or MYBL-altered== | ==Diffuse astrocytoma, MYB- or MYBL-altered== | ||
* Pediatric-type diffuse low-grade glioma. | * Pediatric-type diffuse low-grade glioma. | ||