11617 IUPAC Gold Book - astrocytoma 10.1351/goldbook.11617 11617 current 1 Tumor within the substance of the brain or spinal cord made up of astrocytes. Astrocytomas are classified from Grade I (least aggressive) to Grade IV (most aggressive). This type of tumor does not usually spread outside the brain and spinal cord and it does not usually affect other organs. astrocytes https://goldbook.iupac.org/terms/view/11614 brain https://goldbook.iupac.org/terms/view/11647 PAC, 2015, 87, 841. 'IUPAC Glossary of terms used in neurotoxicology (IUPAC Recommendations 2015)' on page 850 (https://doi.org/10.1515/pac-2015-0103) https://goldbook.iupac.org/terms/view/11617/html https://goldbook.iupac.org/terms/view/11617/json https://goldbook.iupac.org/terms/view/11617/plain Citation: 'astrocytoma' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. 10.1351/goldbook.11617 The IUPAC Gold Book is licensed under Creative Commons Attribution-ShareAlike CC BY-SA 4.0 International (https://creativecommons.org/licenses/by-sa/4.0/) for individual terms. If you are interested in licensing the Gold Book for commercial use, please contact the IUPAC Executive Director at executivedirector@iupac.org . The International Union of Pure and Applied Chemistry (IUPAC) is continuously reviewing and, where needed, updating terms in the Compendium of Chemical Terminology (the IUPAC Gold Book). Users of these terms are encouraged to include the version of a term with its use and to check regularly for updates to term definitions that you are using. 2026-05-10T18:43:42+00:00