title: Morphological and immunohistochemical characterization of paraneoplastic cerebellar degeneration associated with Yo antibodies.
abstract: BACKGROUND
  Immunohistochemical studies of paraneoplastic cerebellar degeneration (PCD) are rare, and the findings vary.
  
  
  METHODS
  We performed morphological and immunohistochemical characterization of the brain, medulla and tumour of two patients with PCD, Yo antibodies and ovarian adenocarcinoma.
  
  
  RESULTS
  The cerebellum of both patients had extensive loss of Purkinje cells. Microglia activation and T cells were found in the cerebellum, but B cells or deposits of IgG or complement were not detected. Microglia activation was also present in the brain stem and medulla. T cells were found in the ovarian adenocarcinoma.
  
  
  CONCLUSIONS
  PCD is characterized by loss of Purkinje cells and microglia activation, and the presence of T cells indicates cellular immune reactions in PCD and in ovarian cancer.
authors.affiliation: Department of Neurology, Haukeland University Hospital, Bergen, Norway.
authors.forename: A
authors.initials: A
authors.lastname: Storstein
authors.forename: B K
authors.initials: BK
authors.lastname: Krossnes
authors.forename: C A
authors.initials: CA
authors.lastname: Vedeler
mesh_terms: D000230:Adenocarcinoma / Q000276:immunology / Q000473:pathology*; D000369:Aged, 80 and over; D001323:Autoantibodies / Q000276:immunology*; D005260:Female; D005911:Gliosis / Q000276:immunology / Q000473:pathology; D006801:Humans; D007150:Immunohistochemistry; D017628:Microglia / Q000276:immunology / Q000473:pathology; D008875:Middle Aged; D009419:Nerve Tissue Proteins / Q000276:immunology*; D010051:Ovarian Neoplasms / Q000276:immunology / Q000473:pathology*; D020362:Paraneoplastic Cerebellar Degeneration / Q000276:immunology / Q000473:pathology*; D011689:Purkinje Cells / Q000276:immunology / Q000473:pathology*
chemical_list: D001323:Autoantibodies; C095184:CDR2 protein, human; D009419:Nerve Tissue Proteins