title: Ultrastructural study of two central nervous system lymphomas.
abstract: Electron microscopy was performed on two CNS lymphomas, one primary and the second a skull metastasis from a brain primary lymphoma. The former revealed a tumor perivascularly arranged, which was composed of rounded cells having no specialized organellae. Biopsies from the primary and metastasis of the second case revealed a predominance of rounded cells with scanty cytoplasm, another population of cells with phagocytic activity and a third group with elongated ctyoplasmic processes which stain positively for microglia. By electron microscopy some of these processes resembled neurites or oligondendroglia, while others suggested an astrocytic appearance.
mesh_terms: D000328:Adult; D001808:Blood Vessels / Q000648:ultrastructure; D001932:Brain Neoplasms / Q000473:pathology*; D002454:Cell Differentiation; D006003:Glycogen / Q000032:analysis; D006689:Hodgkin Disease / Q000473:pathology*; D006801:Humans; D008297:Male; D008870:Microtubules / Q000648:ultrastructure; D008875:Middle Aged; D009362:Neoplasm Metastasis; D009457:Neuroglia / Q000648:ultrastructure; D009940:Organoids / Q000648:ultrastructure; D010586:Phagocytes / Q000648:ultrastructure; D012888:Skull Neoplasms / Q000473:pathology
chemical_list: D006003:Glycogen