PMID- 10334476 OWN - NLM STAT- MEDLINE DCOM- 19990618 LR - 20190816 IS - 0009-9163 (Print) IS - 0009-9163 (Linking) VI - 55 IP - 3 DP - 1999 Mar TI - A brief review of cryptic duplications of 21q as an emerging cause of Down syndrome: practical considerations for accurate detection. PG - 207-11 AB - We review five cryptic duplications of 21q in patients with Down syndrome (DS) that were inherited from parental balanced translocations. All cases were identified by fluorescence in situ hybridization (FISH) and or DNA diagnosis because the phenotype was inconsistent with the initial cytogenetic studies. These rearrangements seem to escape detection without expanded testing and are probably more frequent than expected. For this reason we propose a series of steps combining objective clinical diagnostic criteria, FISH and DNA methods to achieve an accurate ascertainment. FAU - Garcia-Heras, J AU - Garcia-Heras J AD - Genetic Testing Center, Bureau of Laboratories, Texas Department of Health, Denton 76201, USA. jaime.garciaheras@tdh.state.tx.us FAU - Rao, P N AU - Rao PN LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PT - Review PL - Denmark TA - Clin Genet JT - Clinical genetics JID - 0253664 SB - IM MH - Adolescent MH - Adult MH - Child MH - *Chromosome Aberrations MH - *Chromosome Disorders MH - Chromosomes, Human, Pair 21/*genetics MH - Down Syndrome/*genetics/pathology MH - Female MH - Humans MH - In Situ Hybridization, Fluorescence MH - Infant MH - Infant, Newborn MH - Karyotyping MH - Male RF - 21 EDAT- 1999/05/20 00:00 MHDA- 1999/05/20 00:01 CRDT- 1999/05/20 00:00 PHST- 1999/05/20 00:00 [pubmed] PHST- 1999/05/20 00:01 [medline] PHST- 1999/05/20 00:00 [entrez] AID - 10.1034/j.1399-0004.1999.550310.x [doi] PST - ppublish SO - Clin Genet. 1999 Mar;55(3):207-11. doi: 10.1034/j.1399-0004.1999.550310.x.