title: Efficacy and safety of extended thymectomy for elderly patients with myasthenia gravis.
abstract: BACKGROUND
  The number of elderly patients who are diagnosed as myasthenia gravis (MG) is increasing in Japan. Although several factors affecting thymectomy have been well documented, few studies have focused on the efficacy and safety of thymectomy for elderly patients older than 60 years.
  
  
  METHODS
  We evaluated 94 patients with MG who underwent extended thymectomy, and divided them into two groups: patients younger than 59 years and patients older than 60 years. Preoperative patient data, pathology of the thymus, complications, and clinical outcome were evaluated.
  
  
  RESULTS
  In 69 young patients and 25 elderly patients, we observed no significant differences between the two groups with regard to preoperative data. Thymic hyperplasia was present in 45% of the young group and 16% of the elderly group. Remission and improvement rate were 40% and 57% in the young group and 8% and 75% in the elderly group, respectively. There were no serious complications, except one early death due to gastrointestinal bleeding in the elderly group.
  
  
  CONCLUSIONS
  We conclude that thymectomy is a safe and effective alternative for elderly patients with MG.
authors.affiliation: Department of Thoracic and Cardiovascular Surgery, Niigata University School of Medicine, Japan.
authors.forename: M
authors.initials: M
authors.lastname: Tsuchida
authors.forename: Y
authors.initials: Y
authors.lastname: Yamato
authors.forename: T
authors.initials: T
authors.lastname: Souma
authors.forename: K
authors.initials: K
authors.lastname: Yoshiya
authors.forename: T
authors.initials: T
authors.lastname: Watanabe
authors.forename: T
authors.initials: T
authors.lastname: Aoki
authors.forename: J
authors.initials: J
authors.lastname: Hayashi
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D002648:Child; D005260:Female; D006801:Humans; D006965:Hyperplasia; D008297:Male; D008875:Middle Aged; D009157:Myasthenia Gravis / Q000601:surgery*; D012189:Retrospective Studies; D013934:Thymectomy; D013945:Thymoma / Q000601:surgery; D013950:Thymus Gland / Q000473:pathology; D013953:Thymus Neoplasms / Q000601:surgery; D016896:Treatment Outcome