the tumor cells were identified as histiocytes by immunological , cytochemical and ultrastructural criteria ( cytoplasmic lysozyme activity , presence of c3 and fc gamma receptor , strong acid phosphatase and alpha-naphthyl acetate esterase activity , presence of lysosomes , absence of cell junctions and evidence of phagocytosis ) .
C0010834
cytoplasmic
C0024369
lysosomes