Clinical features and outcomes of patients with myasthenia gravis affected by COVID-19: A single-center study.

INTRODUCTION: Myasthenia Gravis (MG) is an autoimmune disorder that can exacerbate for various reasons including infections. In this study, we describe clinical symptoms, outcomes, and management of MG patients affected by COVID-19 infection. METHODS: This observational retrospective study was performed on patients previously diagnosed as MG, presenting with COVID-19 in the clinic or emergency department between April 2020 and August 2021. The clinical data, outcome, and therapeutic interventions were assessed in 83 patients with MG and COVID-19 infection. RESULTS: Seventy-seven patients performed PCR testing for COVID-19, of which 73 (94.8 %) were positive. Seven patients had the positive serologic test for COVID-19 (IgG and IgM). Fifty-seven (68.7 %) patients had lung involvement. Thirty-five (42.1 %) of patients were admitted to the hospital. Twelve (14.5 %) patients needed hospitalization in an intensive care unit (ICU), with a mean stay of 7.36 ± 5.6 days (rang: 2-20 days). Four (4.8 %) patients were intubated and required mechanical ventilation. Sixteen (19.3 %) patients experienced an exacerbation of myasthenia gravis and were treated with PLEX (n = 2), IVIG (n = 7), and intravenous (IV) methylprednisolone (n = 7). The outcome was favorable in 79 patients and fatal in four patients, three of whom had other comorbidities. One patient died due to severe COVID-19 involvement. CONCLUSION: The findings from our study demonstrated that patients with previous MG concurrence with COVID-19 have favorable clinical outcomes. Most patients did not need to be hospitalized and more than 80 % of patients did not display MG exacerbation.

Myasthenia gravis associated with novel coronavirus 2019 infection: A report of three cases.

Several neurological presentations have been reported following coronavirus 2019 (COVID-19) infection. This case report describes three myasthenia gravis (MG) patients presented following COVID-19 infection. We report three adult patients with myasthenic Gravis and COVID-19 infection. The patients are between 38 and 61 years old. Case 1 is a 61-year-old woman with progressive dysphagia, nasal speech, ocular ptosis, diplopia, and proximal muscle weakness for 10 days. She had a COVID-19 infection 6 weeks ago. Case 2 is a 57-year-old man with clinical symptoms of muscular fatigability, diplopia, ptosis, and dysphagia for a week and a positive COVID-19 infection 10 days ago. Case 3 is a 38-year-old woman with fatigability, ptosis, dysphagia, and a diagnosis of COVID-19 infection 4 weeks ago. All patients had a positive RT-PCR for COVID-19 infection by nasopharyngeal swab test and a high-level acetylcholine receptor antibody in the serum. All patients were treated with pyridostigmine and prednisolone with a favorable outcome. MG may appear following COVID-19 infection, and the role of molecular mimicry and latent MG activation should be considered the cause of the disease onset.