MuSK Antibody Positive Myasthenia Gravis Mimicking as Myositis

A BSTRACT Most common neuromuscular junction disorder is Myasthenia gravis (MG) which has variable clinical presentations. Diplopia and drooping of eyelids are the peculiarity of myasthenia gravis. Commonly disease manifests as a fluctuating weakness of skeletal muscles. Although respiratory symptoms may be the initial presenting complaint in a few patients, usually it develops during the later part of the disease course. The initial presentation of isolated prominent respiratory distress is a relatively rare presentation of myasthenia gravis unless accompanied by other clinical features. We report a 40-year-old female patient, who visited our hospital with presenting complaints of breathlessness and generalized myalgia and subsequently developed fatigable weakness during hospitalization.