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[astro- + cyt- + -oma] Tumor of the brain or spinal cord composed of astrocytes. Tumors are graded according to how many mitoses are found in a biopsy specimen, how necrotic they are, and how aggressively they invade surrounding tissues, esp. blood vessels. The least invasive of these tumors are known, according to the World Health Organization (WHO) grading system as (grade I) pilocytic astrocytomas, pleomorphic xanthoastrocytomas, and subependymal giant cell astrocytomas. The average survival for patients with grade 1 astrocytoma is about a decade. The most aggressive (grade IV) astrocytomas are called glioblastoma multiforme. These tumors have a poor prognosis, typically less than a year.
Venes, Donald, editor. "Astrocytoma." Taber's Medical Dictionary, 23rd ed., F.A. Davis Company, 2017. Nursing Central, nursing.unboundmedicine.com/nursingcentral/view/Tabers-Dictionary/747175/all/pilocytic_astrocytoma.
Astrocytoma. In: Venes D, ed. Taber's Medical Dictionary. 23rd ed. F.A. Davis Company; 2017. https://nursing.unboundmedicine.com/nursingcentral/view/Tabers-Dictionary/747175/all/pilocytic_astrocytoma. Accessed July 23, 2019.
Astrocytoma. (2017). In Venes, D. (Ed.), Taber's Medical Dictionary. Available from https://nursing.unboundmedicine.com/nursingcentral/view/Tabers-Dictionary/747175/all/pilocytic_astrocytoma
Astrocytoma [Internet]. In: Venes D, editors. Taber's Medical Dictionary. F.A. Davis Company; 2017. [cited 2019 July 23]. Available from: https://nursing.unboundmedicine.com/nursingcentral/view/Tabers-Dictionary/747175/all/pilocytic_astrocytoma.
* Article titles in AMA citation format should be in sentence-case
TY - ELEC
T1 - astrocytoma
ID - 747175
ED - Venes,Donald,
BT - Taber's Medical Dictionary
UR - https://nursing.unboundmedicine.com/nursingcentral/view/Tabers-Dictionary/747175/all/pilocytic_astrocytoma
PB - F.A. Davis Company
ET - 23
DB - Nursing Central
DP - Unbound Medicine