Representative patterns of FCM of controls and LGw/oRS patients. Stage I hematogones usually formed an easily detectable cluster (arrowhead, top left panel) in controls but were undetectable or faint in LGw/oRS patients (arrowhead, bottom left panel). Abnormally high expression of CD15, CD33, CD11b, and CD4 was observed in LGw/oRS patients (3 bottom right panels) in comparison with the normal expression pattern of these antigens in a control (3 top right panels).