People at highest risk for lymphocytopenia have one of the diseases, conditions, or factors that can cause a low lymphocyte count. This includes people who have:
People who have had steroid therapy or radiation or chemotherapy (treatments for cancer) also are at increased risk. For more information, go to "What Causes Lymphocytopenia?"
The NHLBI updates Health Topics articles on a biennial cycle based on a thorough review of research findings and new literature. The articles also are updated as needed if important new research is published. The date on each Health Topics article reflects when the content was originally posted or last revised.