Myasthenia gravis (MG) is an autoimmune disease characterized by fluctuating muscle weakness that worsens with muscle activity and improves with rest[3][9]. In more than 50% of patients, the first symptoms appear in the eyes, such as ptosis (lid drooping) or diplopia (double vision)[5][8]. In 15–20% of patients, problems with the muscles of the face and throat begin, including difficulty swallowing, chewing, nasal speech or a weak voice[5]. Weakness of the limbs and neck affects about 15% of patients as the first symptom, which can cause unsteady walking or problems with holding the head [5]. Symptoms worsen in the evening or after exertion and include respiratory muscle weakness[1][7]. Diagnosis includes history, clinical tests (eg, Gorelick, ice pack, Cogan test), EMG with a decrease in CMAP amplitude of more than 7–10%, detection of antibodies against AChR or MuSK, and chest CT to rule out thymoma[1][2][3][4].