PMID- 16276107 OWN - NLM STAT- MEDLINE DCOM- 20060203 LR - 20161124 IS - 1424-859X (Electronic) IS - 1424-8581 (Linking) VI - 112 IP - 1-2 DP - 2006 TI - Molecular investigation of a dicentric 13;17 chromosome found in a 21-week gestation fetus with multiple congenital abnormalities. PG - 166-9 AB - We report a 21-week gestation fetus terminated because of multiple congenital abnormalities seen on ultrasound scan, including ventriculomegaly, possible clefting of the hard palate, cervical hemivertebrae, micrognathia, abnormal heart, horseshoe kidney and a 2-vessel umbilical cord. On cytogenetic examination, the fetus was found to have a male karyotype with 45 chromosomes with a dicentric chromosome, which appeared to consist of the long arms of chromosomes 13 and 17. Molecular genetic investigations and fluorescence in situ hybridization (FISH) unexpectedly showed that the derivative chromosome contained two interstitial blocks of chromosome 17 short arm sequences, totalling approximately 7 Mb, between the two centromeres. This effectively made the fetus monosomic for approximately 15 Mb of 17p without the concurrent trisomy for another chromosome normally seen following malsegregation of reciprocal translocations. It also illustrates the complexity involved in the formation of some structurally abnormal chromosomes, which can only be resolved by detailed molecular investigations. CI - Copyright 2006 S. Karger AG, Basel. FAU - Cockwell, A E AU - Cockwell AE AD - Wessex Regional Genetics Laboratory, Salisbury District Hospital, Salisbury, UK. cockwell@alisbury.nhs.uk FAU - Maloney, V K AU - Maloney VK FAU - Thomas, N S AU - Thomas NS FAU - Smith, E L AU - Smith EL FAU - Gonda, P AU - Gonda P FAU - Bass, P AU - Bass P FAU - Crolla, J A AU - Crolla JA LA - eng PT - Case Reports PT - Journal Article PL - Switzerland TA - Cytogenet Genome Res JT - Cytogenetic and genome research JID - 101142708 SB - IM MH - Abnormalities, Multiple/diagnostic imaging/*embryology/*genetics MH - Abortion, Induced MH - Adult MH - *Chromosome Aberrations MH - Chromosome Mapping MH - *Chromosomes, Human, Pair 13 MH - *Chromosomes, Human, Pair 17 MH - Female MH - Gestational Age MH - Humans MH - In Situ Hybridization, Fluorescence MH - Karyotyping MH - Male MH - Pregnancy MH - Sequence Deletion MH - Skin/embryology MH - Ultrasonography EDAT- 2005/11/09 09:00 MHDA- 2006/02/04 09:00 CRDT- 2005/11/09 09:00 PHST- 2005/01/18 00:00 [received] PHST- 2005/02/21 00:00 [accepted] PHST- 2005/11/09 09:00 [pubmed] PHST- 2006/02/04 09:00 [medline] PHST- 2005/11/09 09:00 [entrez] AID - 87530 [pii] AID - 10.1159/000087530 [doi] PST - ppublish SO - Cytogenet Genome Res. 2006;112(1-2):166-9. doi: 10.1159/000087530.