title: Results of surgical treatment for nonthymomatous myasthenia gravis.
abstract: OBJECTIVE
  To clarify the factors that influence improvement and remission after thymectomy for patients with nonthymomatous myasthenia gravis (MG).
  
  
  METHODS
  We retrospectively reviewed 204 patients with nonthymomatous MG who underwent thymectomy and anterior mediastinal dissection through a partial median sternotomy, between 1980 and 2001, and examined whether age, sex, preoperative classification, and duration of symptoms influenced their prognosis.
  
  
  RESULTS
  There was no perioperative or hospital mortality. The mean follow-up period was 7.2 +/- 1.2 years, with early and late postoperative remission rates of 44.6% and 73%, respectively. Seven patients died; two from pneumonia and five from causes unrelated to MG. Preoperative treatment and classification, duration of symptoms, age, and sex did not seem to have a significant influence on remission, but the response to thymectomy was greater in patients with thymic hyperplasia. Remission and improvement rates were significantly better at the end of the first year, with the same status found at the last follow-up.
  
  
  CONCLUSIONS
  Thymectomy is an effective and highly curative method of treatment for patients. with MG. It provides excellent symptomatic improvement, which is enhanced over the long term.
authors.affiliation: Department of Cardiovascular Surgery, Istanbul University School of Medicine, Capa, Istanbul 34390, Turkey.
authors.forename: Turkan
authors.initials: T
authors.lastname: Tansel
authors.forename: Ertan
authors.initials: E
authors.lastname: Onursal
authors.forename: Semih
authors.initials: S
authors.lastname: Barlas
authors.forename: Emin
authors.initials: E
authors.lastname: Tireli
authors.forename: Ufuk
authors.initials: U
authors.lastname: Alpagut
mesh_terms: D000293:Adolescent; D000328:Adult; D000367:Age Factors; D002648:Child; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009157:Myasthenia Gravis / Q000473:pathology / Q000601:surgery*; D011379:Prognosis; D012189:Retrospective Studies; D012737:Sex Factors; D013934:Thymectomy; D016896:Treatment Outcome