You Can't Work on Redsendrom

The first patient you diagnosed with red was a little girl called ashley. Back then we didn't have the technology to do sequencing of a whole gnom or hol, you knowa part of the coding regions of gens. You had to first map the gean, define which chromosome its on, and then sort of walk your way closer and closer to it,. So the obstacle was that it's not a starter to work on redsendrom. Is this caused by a spontaneous mutation, rather than an inherited gean? Correct reendrum is a spontaneous new mutation in every family.