title: Therapy for paraneoplastic neurologic syndromes in six patients with protein A column immunoadsorption.
abstract: BACKGROUND
  Paraneoplastic neurologic syndromes, although rare, cause significant morbidity and mortality. They are thought to be immunologically mediated, but to date those involving the central nervous system (CNS) have not been particularly responsive to immunologic therapy. The use of the novel immunomodulator, protein A immunoadsorption, was explored to address this question.
  
  
  METHODS
  Six patients with neurologic paraneoplastic syndromes were treated with this technique, using the "off line" method. Two hundred fifty ml of plasma was perfused through a column containing protein A covalently attached to a silica matrix. The plasma was then returned to the patient.
  
  
  RESULTS
  Five of the patients responded to the therapy, with complete and durable responses in three patients with opsoclonus-myoclonus, objective, though transient, improvement in one patient with paraneoplastic brainstem encephalitis associated with a Merkel cell tumor, and stabilization and partial improvement in one patient with paraneoplastic limbic encephalitis. The patient without response developed a cutaneous vasculitis after the second treatment, and therapy was discontinued.
  
  
  CONCLUSIONS
  This therapy appears beneficial for a number of paraneoplastic syndromes, most dramatically in the opsoclonus/myoclonus syndrome.
authors.affiliation: Department of Neurology, Massachusetts General Hospital, Boston 02114, USA.
authors.forename: L M
authors.initials: LM
authors.lastname: Cher
authors.forename: F H
authors.initials: FH
authors.lastname: Hochberg
authors.forename: J
authors.initials: J
authors.lastname: Teruya
authors.forename: M
authors.initials: M
authors.lastname: Nitschke
authors.forename: R F
authors.initials: RF
authors.lastname: Valenzuela
authors.forename: J D
authors.initials: JD
authors.lastname: Schmahmann
authors.forename: M
authors.initials: M
authors.lastname: Herbert
authors.forename: H D
authors.initials: HD
authors.lastname: Rosas
authors.forename: C
authors.initials: C
authors.lastname: Stowell
mesh_terms: D000328:Adult; D000368:Aged; D002526:Cerebellar Diseases / Q000628:therapy*; D004660:Encephalitis / Q000628:therapy*; D005260:Female; D006801:Humans; D007163:Immunosorbent Techniques; D008297:Male; D008875:Middle Aged; D009207:Myoclonus / Q000628:therapy*; D015835:Ocular Motility Disorders / Q000628:therapy*; D010257:Paraneoplastic Syndromes / Q000628:therapy*; D013205:Staphylococcal Protein A / Q000627:therapeutic use*
chemical_list: D013205:Staphylococcal Protein A