13409 IUPAC Gold Book - lymphocytopenia 10.1351/goldbook.13409 13409 current synonym: lymphopenia 1 Deficiency of lymphocytes in the blood compared with normal values. This is a characteristic feature of systemic autoimmune diseases [e.g., systemic lupus erythematosus (SLE), Sjögren syndrome, mixed connective tissue disease (MCTD)]. Sjögren syndrome https://goldbook.iupac.org/terms/view/13680 lymphocytes https://goldbook.iupac.org/terms/view/13399 mixed connective tissue disease (MCTD) https://goldbook.iupac.org/terms/view/13465 systemic lupus erythematosus (SLE) https://goldbook.iupac.org/terms/view/13710 PAC, 2012, 84, 1113. 'IUPAC glossary of terms used in immunotoxicology (IUPAC Recommendations 2012)' on page 1206 (https://doi.org/10.1351/PAC-REC-11-06-03) https://goldbook.iupac.org/terms/view/13409/html https://goldbook.iupac.org/terms/view/13409/json https://goldbook.iupac.org/terms/view/13409/plain Citation: 'lymphocytopenia' 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.13409 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. 2026-05-11T05:14:11+00:00