A muscle-specific kinase (MuSK)-associated MG had a higher score for bulbar and respiratory muscles (compared to late-onset MG, seronegative-MG, and ocular MG) and neck muscles (compared to early-onset MG, seronegative-MG, and ocular MG) and a higher total score (compared to early-onset MG, late-onset MG, and ocular MG). Here, MUSK is linked to myasthenia gravis.