<unk>  describes a deletion of the short arm of chromosome 18. About half of the people with deletions have a breakpoint at the centromere. Those with it are said to have centromeric<unk> , and those without are said to have non-centromeric<unk> .
18p-
RUB A535
ZF2001
714-X
Rc-o319
MIS416
SOS box
T-47D