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Ann Thorac Surg 1999;67:1563-1567
© 1999 The Society of Thoracic Surgeons

Original Articles

Efficacy and safety of extended thymectomy for elderly patients with myasthenia gravis

Masanori Tsuchida, MDa, Yasushi Yamato, MDa, Takahiro Souma, MDa, Katsuo Yoshiya, MDa, Takehiro Watanabe, MDa, Tadashi Aoki, MDa, Jun-ichi Hayashi, MDa

a Department of Thoracic and Cardiovascular Surgery, Niigata University School of Medicine, Niigata, Japan

Accepted for publication December 22, 1998.

Address reprint requests to Dr Tsuchida, Department of Thoracic and Cardiovascular Surgery, Niigata University School of Medicine, 1-757 Asahimachi-dori, 951-8510, Japan

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.




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