Prenatal diagnosis of mosaic ring 22 duplication/deletion with terminal 22q13 deletion due to abnormal first trimester screening and choroid plexus cyst detected on ultrasound

Koc A., Arisoy O., Pala E., ERDEM M., Kaymak A. O., Erkal O., ...More

JOURNAL OF OBSTETRICS AND GYNAECOLOGY RESEARCH, vol.35, no.5, pp.978-982, 2009 (SCI-Expanded) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 35 Issue: 5
  • Publication Date: 2009
  • Doi Number: 10.1111/j.1447-0756.2009.01040.x
  • Journal Name: JOURNAL OF OBSTETRICS AND GYNAECOLOGY RESEARCH
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.978-982
  • Keywords: 22q13 deletion, mosaic ring chromosome 22, prenatal diagnosis, trisomy 22, CHROMOSOME-22
  • Dokuz Eylül University Affiliated: No

Abstract

We report a rare case of mosaic ring chromosome 22 duplication/deletion in a fetus for whom karyotype analysis was required because of an abnormal finding in the maternal serum screening test and a choroid plexus cyst detected on prenatal ultrasound. Additional prenatal study of the amniotic fluid by fluorescence in situ hybridization was performed and the terminal 22q13.3 deletion was detected on ring chromosome. The final karyotype was 45,XX,-2[3] / 46,XX,r(22)(p11q13.2)[63] / 46,XX,idicr(22)(p11q13.2;p11q13.2)[2]dn.ishder(22)(N25+, ARSA-, ter-). The pegnancy was terminated. Cytogenetic analysis of the intracardiac blood also revealed ring 22 mosaicism with only one metaphase spread with idicr(22) as the unstable isodicentric rings are subsequently lost from most cells. We discuss the prenatal diagnosis of this rare condition.