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Chronic lymphocytic leukaemia
Lymphocytic leukaemia that is marked by an abnormal increase in the number of mature lymphocytes and especially B cells, that is characterised by slow onset and progression of symptoms which include anaemia, pallor, fatigue, appetite loss, granulocytopenia, thrombocytopenia, hypogammaglobulinemia, and enlargement of the lymph nodes, liver, and spleen, and that occurs especially in older adults.