On Dec. 12, the US Food and Drug Administration (FDA) granted accelerated approval to golodirsen (Vyondys 53) for the treatment of Duchenne muscular dystrophy (DMD) in patients amenable to skipping exon 53. It is the second exon-skipping, disease-modifying drug to treat DMD, the most common childhood form of muscular dystrophy. The drug is administered by intravenous . . .