Nonmosaic smallest duplication of 12q24.31-qter: The first reported case

Julie Won Ireland, Syed M. Jalal, Pamela S. McGrann, Noralane M. Lindor

Research output: Contribution to journalArticlepeer-review

12 Scopus citations


Duplication of the terminal region of the long arm of chromosome 12 is not common. In 13 previous cases, duplication of this region was generally associated with deletions of the derivative chromosomes, larger sized duplications or mosaicism. We have studied a young man with a nonmosaic duplication of 12q24.31-qter translocated to chromosome 5pter. This is the first reported case of pure subtle duplication involving less than two terminal subbands of 12q24.31 to qter. The origin of this genetic material was confirmed by whole chromosome paints and subtelomere specific FISH probes. As both the subtelomere signals for 5p and 12q were present in the der(5) chromosome, it is unlikely that there was any loss of unique DNA sequences from the terminal region of chromosome 5p. This case is compared with 13 other reported cases with a duplication of the 12q terminal segment.

Original languageEnglish (US)
Pages (from-to)305-310
Number of pages6
JournalAmerican Journal of Medical Genetics
Volume128 A
Issue number3
StatePublished - Jul 30 2004


  • Duplication 12qter
  • Subtelomere FISH

ASJC Scopus subject areas

  • Genetics
  • Genetics(clinical)


Dive into the research topics of 'Nonmosaic smallest duplication of 12q24.31-qter: The first reported case'. Together they form a unique fingerprint.

Cite this