Cervical thymectomy in the treatment of myasthenia gravis.

Treatment modalities in myasthenia gravis consist of surgery, chemotherapy and plasmapheresis. Thymectomy can be accomplished either through a median sternotomy or through a small, transverse cervical incision. Forty patients who underwent cervical thymectomy for non-thymomatous myasthenia gravis were studied retrospectively. Twenty-six patients (65%) showed a favourable response to thymectomy and there were statistically significant improvements in myasthenic symptoms and reductions in medication requirements. Age, sex, duration of symptoms and thymic histology were not predictive of response to thymectomy. Operative mortality was zero and operative morbidity was minimal. During the last 6 years, only two of 22 patients required admission to the intensive care unit postoperatively. The postoperative hospital stay ranged from 2 to 23 days. Cervical thymectomy does not preclude later sternotomy in those patients who fail to respond favourably. We therefore recommend cervical thymectomy as the initial surgical procedure in the treatment of non-thymomatous myasthenia gravis.