DiGeorge syndrome, a 22q11.2 deletion syndrome, is caused when a small portion of chromosome 22 is missing. The condition can ...
the deletion of chromosome 15q11-13 associated with Prader-Willi and Angelman syndromes, and b) the deletion of 22q11.21-11.23 (bottom) associated with DiGeorge and velocardiofacial syndromes.