The molecular basis of the renal malformation is unknown; deletion of one or more genes could be responsible. The 22q11.2 microdeletion syndrome is a frequent cause of kidney malformation and ...

So the researchers used MRI scans to investigate the brains of 80 human patients with 22q deletion syndrome, who have a missing section of chromosome 22 containing about 25 different genes.

Two years ago, they finally got an answer, Mercy was diagnosed with DiGeorge Syndrome also known as 22q11.2 deletion syndrome ... was diagnosed with 22q. So what is 22-q?