PMID- 8004805 OWN - NLM STAT- MEDLINE DCOM- 19940719 LR - 20190816 IS - 0009-9163 (Print) IS - 0009-9163 (Linking) VI - 45 IP - 2 DP - 1994 Feb TI - A woman with an apparent non-mosaic 45,X delivered a 46,X,der(X) liveborn female. PG - 93-6 AB - A liveborn female with a phenotype suggestive of Down syndrome is reported. Cytogenetic lymphocyte analysis showed a 46,X der(X) karyotype. Fluorescence in situ hybridization (FISH) with a biotinylated probe specific for chromosome 21 showed no signal on the der(X). This marker was homogeneously painted using a specific probe for X chromosome. In addition, FISH analysis detected telomeres on the rearranged X. Therefore, the proband's karyotype was reevaluated as 46,X,del(X) (pter-->p22.2::p11.3-->qter). Cytogenetic analysis of 150 lymphocytes in the mother disclosed a homogeneous 45,X karyotype. FISH analysis of interphase nuclei using the X chromosome painting probe showed two domains of different sizes in 0.8% of cells. This led us to study further metaphases in the mother. In one out of 450 metaphases scored, after FISH with the X chromosome painting probe, the del(X) was observed, confirming that the rearranged X chromosome found in the newborn had segregated from a 45,X/46,X,del(X) mother. FAU - Palka, G AU - Palka G AD - Istituti di Biologia e Genetica, Umana Universita di Chieti, Italy. FAU - Calabrese, G AU - Calabrese G FAU - Stuppia, L AU - Stuppia L FAU - Guanciali Franchi, P AU - Guanciali Franchi P FAU - Morizio, E AU - Morizio E FAU - Peila, R AU - Peila R FAU - Antonucci, A AU - Antonucci A LA - eng PT - Case Reports PT - Journal Article PL - Denmark TA - Clin Genet JT - Clinical genetics JID - 0253664 SB - IM MH - Cells, Cultured MH - Female MH - Humans MH - In Situ Hybridization, Fluorescence MH - Infant, Newborn MH - Karyotyping MH - *Monosomy MH - Mosaicism MH - Phenotype MH - *Sex Chromosome Aberrations MH - *X Chromosome EDAT- 1994/02/01 00:00 MHDA- 1994/02/01 00:01 CRDT- 1994/02/01 00:00 PHST- 1994/02/01 00:00 [pubmed] PHST- 1994/02/01 00:01 [medline] PHST- 1994/02/01 00:00 [entrez] AID - 10.1111/j.1399-0004.1994.tb04001.x [doi] PST - ppublish SO - Clin Genet. 1994 Feb;45(2):93-6. doi: 10.1111/j.1399-0004.1994.tb04001.x.