http://forum.pediatricsboardreview.com/forums/topic/absolute-lymphocyte-count-in-scid-etc/feed Fri, 10 Apr 2026 23:17:20 +0000 http://bbpress.org/?v=2.5.8-5815 en-US http://forum.pediatricsboardreview.com/forums/topic/absolute-lymphocyte-count-in-scid-etc/#post-460 http://forum.pediatricsboardreview.com/forums/topic/absolute-lymphocyte-count-in-scid-etc/#post-460 Thu, 22 Aug 2013 14:58:06 +0000 MikeBlyth The notes say, for SCID, “Look for a low Absolute Lymphocyte Count (ALC) that is well below 40.” Primary Immunodeficiency Diseases: Definition, Diagnosis, and Management says “Absolute lymphocyte counts are often less than 1000, but normal lymphocyte counts do not exclude SCID,” and another article, “Diagnosis of severe combined immunodeficiency,” says “an absolute lymphocyte count of less than 2.8 × 10e9/litre is 2 SD below the mean. When infants with infection have a count lower than this, it is highly likely that they have SCID.” Where does this very low criterion (ALC < 40) come from?

]]>