PMID- 12210569 OWN - NLM STAT- MEDLINE DCOM- 20030213 LR - 20131121 IS - 0197-3851 (Print) IS - 0197-3851 (Linking) VI - 22 IP - 8 DP - 2002 Aug TI - Prenatal detection of structural abnormalities of chromosome 18: associations with interphase fluorescence in situ hybridization (FISH) and maternal serum screening. PG - 645-8 AB - We describe two cases of prenatally ascertained isochromosome 18. Case 1 included both an isochromosome 18p and an isochromosome 18q, while Case 2 involved only an isochromosome 18q. Both of these cases were associated with a positive maternal serum triple screen trisomy 18 risk (greater than 1 in 100 risk). In addition, fluorescence in situ hybridization (FISH) was performed on uncultured amniotic fluid interphase cells in both cases looking for aneuploidy for chromosomes 13, 18, 21, X and Y. The results of the interphase analyses support the common knowledge that careful interpretation of interphase FISH analysis is necessary and that results should be followed by full cytogenetic analysis. To our knowledge these are the first reported cases of structurally abnormal chromosomes 18 being associated with a positive maternal serum triple screen for trisomy 18. CI - Copyright 2002 John Wiley & Sons, Ltd. FAU - Graf, Michael D AU - Graf MD AD - Department of Genetics and Center for Human Genetics Laboratory, Case Western Reserve University and University Hospitals of Cleveland, Cleveland, OH 44106, USA. michael.graf@uhhs.com FAU - Gill, Prabhcharan AU - Gill P FAU - Krew, Michael AU - Krew M FAU - Schwartz, Stuart AU - Schwartz S LA - eng PT - Case Reports PT - Journal Article PL - England TA - Prenat Diagn JT - Prenatal diagnosis JID - 8106540 RN - 0 (Chorionic Gonadotropin) RN - 0 (alpha-Fetoproteins) RN - FB33469R8E (Estriol) SB - IM MH - Adult MH - Amniocentesis MH - Amniotic Fluid/chemistry/cytology MH - Chorionic Gonadotropin/blood MH - *Chromosome Aberrations MH - *Chromosomes, Human, Pair 18 MH - Estriol/blood MH - Female MH - Gestational Age MH - Humans MH - In Situ Hybridization, Fluorescence MH - Interphase MH - Isochromosomes MH - Male MH - *Prenatal Diagnosis MH - Trisomy MH - alpha-Fetoproteins/analysis EDAT- 2002/09/05 10:00 MHDA- 2003/02/14 04:00 CRDT- 2002/09/05 10:00 PHST- 2002/09/05 10:00 [pubmed] PHST- 2003/02/14 04:00 [medline] PHST- 2002/09/05 10:00 [entrez] AID - 10.1002/pd.354 [doi] PST - ppublish SO - Prenat Diagn. 2002 Aug;22(8):645-8. doi: 10.1002/pd.354.