A surprisingly low seropositiity rate of anti-acetylcholine-receptor antibodies (1/7) and anti-MuSK (Muscle Specific Kinase) antibodies (0/6) were found in these dysphonia MG patients.

• 该诊断在新斯的明（胆碱酯酶抑制剂）试验阳性之前或之后通过纤维喉镜检查和声学分析而被确定。