To better understand myasthenia gravis, let's review normal muscle contraction but at the cellular level.

为了更好理解重症无力，我们从细胞水平来了解一下肉正常收缩时状态。

The man, Rufino Borrego, told Portuguese media that a neurologist has found after more than four decades that he suffered from a different disease myasthenia, which unlike the initial diagnosis of muscular dystrophy, is curable.

博雷戈(Rufino Borrego)告诉葡萄牙媒体，一位神经病学家40才发现他患是另外一种无力疾病，而不是最初诊断肉萎缩症，是可以治愈。

Finally, a lot of people with myasthenia gravis undergo surgical removal of the thymus.

最终，许重症无力患者会进行胸腺切除术。

The good news is is that treatment has been able to reduce mortality from myasthenia gravis.

好消息是现在治疗方案可以降低重症无力死亡率。

In very rare cases, myasthenia gravis can present as a paraneoplastic syndrome, which means that an underlying cancer like bronchogenic carcinoma or thymic neoplasm (also known as thymoma) generates an immune response which results in generation of autoantibodies.

在极罕见情况下，重症无力会表现出副肿瘤综合征，这意味着潜在癌症如支气管肺癌、胸腺肿瘤导致免疫应答产生了自身抗体。

But what happens in myasthenia gravis though?

但是重症无力是如何发生呢？