If de novo deletion occurs then both the parents have normal chromosomes, and chances that another child will have the deletion decline. Very few cases have been found in which the deletion has been present in mosaic form (where some of the cells have deletion on chromosome 11 and some do not, and the symptoms are less severe) in one of the parents, which increases the risk of having another child with<unk> . When the child's chromosomal abnormality occurs due to one of the parents' balanced translocation, the chances of another child having the abnormality is high.
Jacobsen syndrome
Senior–Løken syndrome
McGillivray syndrome
Mungan syndrome
Lelis syndrome
Sanjad-Sakati syndrome
Barakat-Perenthaler syndrome
Bart syndrome