title: Histiocyte X positivity for nonspecific esterase.
abstract: The cell membrane and X bodies of histiocytes X from two cases of eosinophilic granuloma were stained by nonspecific esterase. The results show that histiocytes X possess a cell membrane exoenzyme similar to that of other histiocytes, such as alveolar macrophages, but the role of the X body as related to enzyme activity remains an unknown.
mesh_terms: D002462:Cell Membrane / Q000648:ultrastructure; D003594:Cytoplasmic Granules / Q000648:ultrastructure; D004950:Esterases / Q000032:analysis*; D006646:Histiocytosis, Langerhans-Cell / Q000201:enzymology* / Q000473:pathology; D006801:Humans; D008854:Microscopy, Electron; D013194:Staining and Labeling
chemical_list: D004950:Esterases