Clinical spectrum of neuromuscular complications after immune checkpoint inhibition

•Neuromuscular complications are most common in first three months.•Muscle complications and high serum CK are common with new onset of weakness.•There is a high prevalence of myasthenia overlap with myositis and/or myocarditis.•Pre-existing myasthenia gravis is associated with high morbidity.•Diplopia may be caused either by myasthenia gravis or orbital myositis.