重症肌无力是临床常见病,其典型病例不难诊断。但对症状不典型或询问病史不详出现危象者常可造成误诊.现将重症肌无力危象误诊为肺炎并发呼吸衰竭一例报告如下,以供同道们借鉴。患者,男,56岁,农民.住院号115625。因咳喘呼吸困难10余天于1986年2月7日入院。病人10天前因“感冒”而轻度咳嗽、气喘,有时发热畏寒.胸痛,吐少量白痰.并党周身乏力,食欲减退,咀嚼困难.曾以“支气管感染”给肌注抗生素,口服止咳平喘药治疗,病情无明显好转,近日来渐加重, Myasthenia gravis is a common clinical disease, its typical case is not difficult to diagnose. However, the symptoms of atypical or ask the history of the crisis is often unknown can cause misdiagnosis.Acute myasthenia gravis crisis will now be misdiagnosed as pneumonia complicated with respiratory failure as a case report below, for the fellow learners to learn from. Patient, male, 56 years old, farmer. Hospital number 115625. Dyspnea due to cough and more than 10 days in February 7, 1986 admission. Patient 10 days ago due to “cold” and mild cough, asthma, and sometimes chills. Chest pain, spit a small amount of sputum. And the party whole body fatigue, loss of appetite, chewing difficulties .To “bronchial infection” intramuscular antibiotics, oral Cough and asthma medication, no significant improvement in the condition, gradually aggravating in recent days,