thus , h-x cells were easily distinguished from benign macrophage-histiocytes , which show diffuse cytoplasmic staining , and malignant cells of malignant histiocytosis and monoblastic leukemia , which did not stain with pna , pna staining proved more useful than leu-m1 antibody for this purpose , since neither interdigitating reticulum cells in ten reactive lymph nodes nor langerhans'-type cells in three cases of h-x were stained with leu-m1 antibody .
C0019621
h-x
C0019618
histiocytosis