Electron Microscopic Study of Xanthoma Cells**From the Instituto Venezolano de Investigaciones Cientificas, Caracas, Venezuela, and the Leprosy Research Laboratory, Kyoto University School of Medicine, Kyoto, Japan.

The xanthoma cell, which is one of the lipid deposited cells, has been studied histochemically by light microscopy. However, with the resolv-ability of light microscope, it is difficult to confirm the morphological process of lipid deposition in the xanthoma cell. In order to facilitate the study of the cytoplasmic elements of this cell, the application of the electron microscope and ultra-thin sectioning has been of value.