Six patients had classical PNH with hemolytic anemia and large PNH clones (> 60% neutrophils [FLAER/CD24] and monocytes [FLAER/CD14), three had PNH with small clones (< 10% granulocytes and monocytes) in the context of another bone marrow disorder, and one had subclinical PNH with a clone size < 1% [49]. This evidence concerns the gene CD24 and bone marrow disorder.