title: Enzyme replacement therapy for mucopolysaccharidosis II from 3 months of age: a 3-year follow-up.
abstract: OBJECTIVE
  We present a 3-year follow-up of a boy with mucopolysaccharidosis type II (MPS II) who had idursulfase therapy initiated at the age of 3 months and compare his clinical course to his healthy twin brother.
  
  
  METHODS
  Detailed anthropometric features, ultrasound studies of liver and spleen volumes, echocardiography and audiological examinations, psychological tests, joint range of motion (ROM) and skeletal radiographs were monitored.
  
  
  RESULTS
  After 3 years of treatment, the patient has not developed any clinical manifestations of MPS II. He did not develop coarse facial features, joint disease, or organomegaly, and his cardiac function remained normal. There were no pronounced signs of dysostosis multiplex on radiographs. The only difference when compared with his healthy twin brother was lower IQ (Termann-Merrill 98 vs. 118) and mild deformity of one vertebrae.
  
  
  CONCLUSIONS
  Our study suggests that early initiation of enzyme replacement therapy may significantly slow or prevent the development of irreversible disease manifestations and therefore modify the natural history of MPS II.
authors.affiliation: Metabolic Diseases Clinic, The Children's Memorial Health Institute, Warsaw, Poland.
authors.forename: A
authors.initials: A
authors.lastname: Tylki-Szymanska
authors.forename: A
authors.initials: A
authors.lastname: Jurecka
authors.forename: Z
authors.initials: Z
authors.lastname: Zuber
authors.forename: A
authors.initials: A
authors.lastname: Rozdzynska
authors.forename: J
authors.initials: J
authors.lastname: Marucha
authors.forename: B
authors.initials: B
authors.lastname: Czartoryska
mesh_terms: D002675:Child, Preschool; D004200:Diseases in Twins / Q000188:drug therapy*; D056947:Enzyme Replacement Therapy; D005500:Follow-Up Studies; D006801:Humans; D007066:Iduronate Sulfatase / Q000627:therapeutic use*; D007223:Infant; D008297:Male; D016532:Mucopolysaccharidosis II / Q000188:drug therapy*; D016896:Treatment Outcome
chemical_list: D007066:Iduronate Sulfatase; C517982:idursulfase