CD19 and prolymphocytic leukemia: A case of PLL diagnosed with: High serum IgG, BAL showing 45% plasma cells and 18% lympocytes, CD19(+), IgG/albumin ratio 13 times higher and IL-6/albumin ratio29 times higher in BAL than serum. The PCR on the DNA extracted from the surgical specimen showed rearrangement of the immunoglobulin heavy chain gene