Similar findings have been reported elsewhere.(3,14) However, their clinical significance remains to be determined.(3,9,14) Type II PNH leukocyte detection is not limited to the use of CD157; markers such as CD55, CD59, CD24 (neutrophils) and CD14 (monocytes) can also be employed. Here, CD59 is linked to paroxysmal nocturnal hemoglobinuria.