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自1957～1973年多伦多儿童医院收治了22例重症肌无力患者。发病率是1:40000,其中10%是16岁以下的患者,此22例年龄是24小时～16岁。重症肌无力分三型,①新生儿一过性肌无力,(母亲有重症肌无力病),表现一过性,但有潜在的死亡危险。②持续性新生儿重症肌无力,生后第一至第三个月可认出,很少有家族史。③幼年型,分两种形式,一种只影响眼外肌,另一种普遍的影响所有的自主肌肉。11例幼年全身型肌无力和1例新生儿持续型肌无力的患者进行了胸腺切除术。年龄2.5岁～16岁,平均10.8岁,病史由1个月～2年.平均3.5月,早期手术效果较好,自1967年以后,术前
From 1957 to 1973, Toronto Children’s Hospital admitted 22 patients with myasthenia gravis. The incidence was 1: 40000, of which 10% were under 16 years of age, the 22 cases were aged 24 hours to 16 years. Myasthenia gravis divided into three types, ① newborn transient muscle weakness, (my mother has myasthenia gravis disease), the performance of transient, but there is a potential risk of death. ② persistent neonatal myasthenia gravis, first to third months after birth can be recognized, very few family history. ③ juvenile, divided into two forms, one only affects the extraocular muscles, the other a universal impact on all the autonomous muscles. Thymectomy was performed in 11 young full body muscle weakness patients and 1 neonatal persistent muscle weakness. Age 2.5 years old to 16 years old, average 10.8 years old, history from 1 month to 2 years an average of 3.5 months, early surgery is better, since 1967, preoperative