PMID- 8778416 OWN - NLM STAT- MEDLINE DCOM- 19960916 LR - 20041117 IS - 0024-7758 (Print) IS - 0024-7758 (Linking) VI - 41 IP - 3 DP - 1996 Mar TI - Interphase fluorescence in situ hybridization in a Turner syndrome variant with IsoXq. A case report. PG - 175-8 AB - BACKGROUND: Performing fluorescence in situ hybridization (FISH) on uncultured amniotic fluid cells has been known to produce rapid diagnoses of major chromosomal aberrations. However, if the aberration involves a structural chromosomal anomaly, the FISH result may be not only uninformative but misleading. CASE: FISH with alpha-satellite probes of chromosomes X and Y was performed on the uncultured amniocytes of a prenatal amniotic fluid specimen. Eighty-five percent of the hybridized interphase nuclei displayed two signals when probing with X; no significant hybridization was found when probing with Y. This FISH result was interpreted as normal, disomic for chromosome X. Cytogenetic analysis later, however, disclosed the fetal karyotype to be 46,X,i(Xq). CONCLUSION: Interphase FISH with an alpha-satellite probe (or probe made of repeat centromeric sequences) may be useful in the detection of a numerical anomaly of a chromosome but not of a structural anomaly within the chromosome itself. FAU - Chang, S D AU - Chang SD AD - Department of Obstetrics and Gynecology, Chang Gung Memorial Hospital, Keelung, Taiwan, Republic of China. FAU - Lin, S L AU - Lin SL FAU - Chen, F P AU - Chen FP FAU - Chu, K K AU - Chu KK LA - eng PT - Case Reports PT - Journal Article PL - United States TA - J Reprod Med JT - The Journal of reproductive medicine JID - 0173343 SB - IM MH - Amniotic Fluid/*cytology MH - Female MH - Humans MH - In Situ Hybridization, Fluorescence MH - Interphase MH - Karyotyping MH - Pregnancy MH - Prenatal Diagnosis MH - Turner Syndrome/*diagnosis EDAT- 1996/03/01 00:00 MHDA- 1996/03/01 00:01 CRDT- 1996/03/01 00:00 PHST- 1996/03/01 00:00 [pubmed] PHST- 1996/03/01 00:01 [medline] PHST- 1996/03/01 00:00 [entrez] PST - ppublish SO - J Reprod Med. 1996 Mar;41(3):175-8.