There is no generally recognized staging system for childhood astrocytomas. For the purposes of this summary, childhood astrocytomas will be described as follows:
Low-grade astrocytoma—grades I and II (e.g., pilocytic astrocytomas and diffuse fibrillary astrocytomas).
High-grade astrocytoma—grades III and IV (anaplastic astrocytomas and glioblastoma).
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WebMD Public Information from the National Cancer Institute
May 28, 2015
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