<unk>  is a congenital genetic disorder characterized by moderate to severe intellectual disability, delayed growth, hypotonia, seizures, limited speech ability, malformations, hearing and vision impairment, and distinct facial features. The symptoms may vary, depending on the exact location of the chromosomal deletion. The condition is caused by a genetic deletion (loss of a segment of DNA) on the outermost band on the short arm (p) of chromosome 1. It is one of the most common deletion syndromes. It is estimated that the syndrome occurs in one in every 5,000 to 10,000 births.
1p36 deletion syndrome
2q37 deletion syndrome
13q deletion syndrome
22q13 deletion syndrome
22q11.2 distal deletion syndrome
1q21.1 deletion syndrome
9q34 deletion syndrome
17q12 microdeletion syndrome