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Clinical Profile and Outcome of Myasthenic Crisis In Central Taiwan.
Wong YS1, Ong CT2, Sung SF3, Wu CS3, Hsu YC3, Su YH3, Hung LC3.
Acta Neurol Taiwan. 2016 Dec 15;25(4):129-135.
Myasthenia gravis (MG) is an autoimmune disease caused by antibodies to acetylcholine receptors of the skeletal muscle. Myasthenic crisis (MC) is a complication observed during both early and late stage MG cases. In this study, we examined current treatments and three years outcomes in patients with MG and MC. We also investigated the impact of thymectomy and systemic lupus erythematosus (SLE) in patients with MG and MC.
In this retrospective study, we reviewed the medical records of all patients admitted to one teaching hospital between January 2006 and December 2014 and identified those for whom discharge diagnosis included the International Classification of Diseases, ninth revision (ICD-9) codes corresponding to MG (358.X, all extensions and all positions).
We identified 29 patients and 49 hospitalizations. Among these patients, the cause for initial hospitalization was MG in 16 cases and MC in 13 cases. Six out of the 16 MG patients were readmitted within 3 years; with 2 of the cases due to MC. Eight of the initial 13 MC patients were readmitted within 3 years, and 6 of the cases due to MC. Among these 15 MC patients, 14 were admitted to the intensive care unit (ICU), and 8 were intubation and put on mechanical ventilators. The median ICU stay was 7 days (3-45). Both MG patients who were also diagnosed with SLE experienced MC. One patient died during the first-time hospitalization, and one patient died during re-hospitalization within 2 years.
Plasma exchange (PE) is the main treatment modality of MC, and most patients in our cohort had a good response. Infection is the most common trigger of MC and a significant cause of death. Despite significant morbidity and mortality in patients with MC, a favorable long-term outcome is possible with intensive treatment. Key Words: myathenia gravis, myasthenic crisis, systemic lupus erythematosus, outcome.