PMID- 8766134 OWN - NLM STAT- MEDLINE DCOM- 19961107 LR - 20041117 IS - 0003-3995 (Print) IS - 0003-3995 (Linking) VI - 39 IP - 2 DP - 1996 TI - Genetic counselling in a prenatal marker chromosome identified as an i (18p) by in situ hybridization. PG - 61-3 AB - The origin of a de novo metacentric small marker chromosome found in a cytogenetic study in amniotic fluid was determined by fluorescence in situ hybridization (FISH) using chromosome specific probes. It was identified as an isochromosome 18p. We want to emphasize that when an extra chromosome is found in prenatal diagnosis and it cannot be identified by conventional cytogenetics banding, FISH should be applied in order to give real risks for fetal anomalies and an accurate genetic counselling. FAU - Darnaude, M T AU - Darnaude MT AD - Laboratory of Genetics, Mostoles Hospital, Madrid, Spain. FAU - Diaz de Bustamante, A AU - Diaz de Bustamante A FAU - Cabello, P AU - Cabello P FAU - Vallcorba, I AU - Vallcorba I LA - eng PT - Case Reports PT - Journal Article PL - Netherlands TA - Ann Genet JT - Annales de genetique JID - 0370562 RN - 0 (Genetic Markers) SB - IM MH - Amniotic Fluid/physiology MH - Child, Preschool MH - *Chromosomes, Human, Pair 18 MH - Fibroblasts/physiology MH - *Genetic Counseling MH - Genetic Markers MH - Humans MH - In Situ Hybridization, Fluorescence MH - *Isochromosomes MH - Karyotyping MH - Lymphocytes/physiology MH - Male MH - Prenatal Diagnosis/*methods EDAT- 1996/01/01 00:00 MHDA- 1996/01/01 00:01 CRDT- 1996/01/01 00:00 PHST- 1996/01/01 00:00 [pubmed] PHST- 1996/01/01 00:01 [medline] PHST- 1996/01/01 00:00 [entrez] PST - ppublish SO - Ann Genet. 1996;39(2):61-3.