Letter to Editor
Gargantilla P, Arroyo N and
Abstract
The term plasma cell leukemia (PCL) is the most aggressive form of the plasma cell dyscrasias and it`s used when the number of circulating plasma cells is significant. It`s defined by the presence of >2 × 109/L peripheral blood plasma cells or accounting for >20% of the differential white cell count, that does not arise from preexisting multiple myeloma.