This is reassuring. My wife's family has a hyper-rare form of mostly-harmless DMD -- like, every genetic test says my father in law has DMD but he's a healthy octogenarian when most sufferers never saw 30. But it means I always worry about mys son and nephews that may have the gene.
Serum CK testing would be a reasonable cost available surrogate test, if in normal range than muscle isn't being destroyed as one would see in traditional DMD cases. If high, run the genetic test, free in the US and Canada via Decode Duchenne.
