title: [Observation on oligodendroglioma with light, electron microscopy and immunohistochemistry].
abstract: OBJECTIVE
  To investigate the ultrastructural and histological characteristics of oligodendroglioma (ODG).
  
  
  METHODS
  By means of light microscopy and partially electron microscopy and immunohistochemistry, 65 cases of ODG were observed.
  
  
  RESULTS
  According to WHO classification of the tumor, all 65 cases of ODG were graded in the degree of differentiation of tumor cells, showing 19 cases of Grade I, 32 cases of Grade II and 14 cases of Grade III.
  
  
  CONCLUSIONS
  (1) The presence of glial filaments in tumor cells may be explained as a heterogeneity in differentiation. (2) Besides the degree of differentiation, some other criteria such as cellular density and mitotic activity are also closely related to the grading of ODG.
authors.affiliation: Department of Pathology, West China University of Medical Sciences, Chengdu.
authors.forename: Z
authors.initials: Z
authors.lastname: Hang
authors.forename: D
authors.initials: D
authors.lastname: Chen
authors.forename: Y
authors.initials: Y
authors.lastname: Wei
mesh_terms: D000293:Adolescent; D000328:Adult; D001932:Brain Neoplasms / Q000737:chemistry / Q000473:pathology* / Q000648:ultrastructure; D002648:Child; D003937:Diagnosis, Differential; D005260:Female; D005904:Glial Fibrillary Acidic Protein / Q000032:analysis*; D006801:Humans; D007150:Immunohistochemistry; D008297:Male; D008875:Middle Aged; D009837:Oligodendroglioma / Q000737:chemistry / Q000473:pathology* / Q000648:ultrastructure; D016708:Synaptophysin / Q000032:analysis
chemical_list: D005904:Glial Fibrillary Acidic Protein; D016708:Synaptophysin