Despite the presence of BCL-2/IgH rearrangements, the accumulation of B lymphocytes in PPBL is not related to an overexpression of BCL-2 protein..     ///    No BCL-2 protein over expression but BCL-2/IgH rearrangements in B cells of patients with persistent polyclonal B-cell lymphocytosis..     ///    "We demonstrated: (a) the constant presence of BCL-2/IgH rearrangements in eight out of eight DNA samples, (b) multiple rearrangements in three out of eight cases and, (c) normal BCL-2 protein expression, as compared to BCL-2 level in B-lymphocytes from healthy population. "    ///    "We studied the presence of BCL-2/IgH rearrangements in a series of eight PPBL patients (seven females and one male) by a nested polymerase chain reaction (PCR), targeting the Major Breakpoint Region in BCL-2 locus and we explored the BCL-2 protein expression by Western blot. "