Persistent Polyclonal B-Cell Lymphocytosis, also known as ppbl, is related to b-cell expansion with nfkb and t-cell anergy and lymphoproliferative syndrome. An important gene associated with Persistent Polyclonal B-Cell Lymphocytosis is CARD11 (Caspase Recruitment Domain Family Member 11). Affiliated tissues include b cells and bone marrow, and related phenotypes are splenomegaly and hepatomegaly