Late presentations of congenital myasthenic syndromes: How many do we miss?

Abstract excerpt

INTRODUCTION: Congenital myasthenic syndromes (CMS) usually present neonatally or in early childhood. When they present later, they may be mistaken for seronegative autoimmune myasthenia, and unnecessary immunosuppressive treatment may be administered. METHODS: Patients who met criteria for seronegative generalized myasthenia without congenital or early childhood onset, but with an affected sibling were tested...

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