It is incredibly rare, with fewer than 190 cases described. Although rare, deletions involving chromosome<unk>  are among the most commonly observed monosomies Chromosome 13, Partial Monosomy<unk>  appears to affect females slightly more frequently than males. Since the disorder was originally reported in 1963, more than 125 cases have been recorded in the medical literature. The age of onset can vary from patient to patient because of the differences in deletions. For example, a study was able to demonstrate for the first time that a patient with a hemangioendothelioma of the liver with a simultaneous deletion in chromosome<unk>  of 28Mb did not develop Rb until the age of 3 years while other patients with similar deletions have immediate clinical manifestations upon birth.
13q deletion syndrome
22q13 deletion syndrome
2q37 deletion syndrome
9q34 deletion syndrome
22q11.2 distal deletion syndrome
1q21.1 deletion syndrome
Chromosome 5q deletion syndrome
1p36 deletion syndrome