To investigate the clinical features of ocular myasthenia gravis (OMG) in ophthalmology. A total of 28 patients with ptosis or diplopia who were followed for at least 6 months between March 2016 and February 2022 were included in this study. The clinical symptoms of the patients and test results were analyzed. According to the positivity of serologic or electrophysiologic test, these patients were divided into 2 groups (positive and negative OMG results) and according to the clinical symptoms of diplopia or ptosis for comparison. Ptosis, diplopia, and both ptosis and diplopia were present in 6 (21.43%), 14 (50.0%), and 8 (28.57%) patients, respectively. Acetylcholine receptor auto-antibody (AchR Ab) was positive in 16 (57.14%) of 28 patients and the ice test was positive in 13 (92.86%) of 14 patients with ptosis. Abnormal thymic lesions were presented in 7 (25.0%) patients, and a definite improvement in response to pyridostigmine was observed in 27 (100.0%) patients. Both ptosis and diplopia were significantly higher in the group with positive results than that in the negative results group (P = .025). In addition, both horizontal and vertical diplopia was significantly higher in the group with AchR Ab titer > 5.0 than that in the group with AchR Ab titer < 5.0 (P = .041). After excluding cranial nerve palsy, if there is ptosis and diplopia, especially vertical diplopia, the possibility of OMG should be considered.
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| http://dx.doi.org/10.1097/MD.0000000000031972 | DOI Listing |
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