PMID- 8737976 OWN - NLM STAT- MEDLINE DCOM- 19961122 LR - 20190816 IS - 0009-9163 (Print) IS - 0009-9163 (Linking) VI - 49 IP - 3 DP - 1996 Mar TI - Rothmund-Thomson syndrome in siblings: evidence for acquired in vivo mosaicism. PG - 124-9 AB - Rothmund-Thomson syndrome (RTS) is an autosomal recessive disorder characterized by skin abnormalities that appear in infancy, skeletal abnormalities, juvenile cataracts and other manifestations of premature aging, and a predisposition to malignancy. The diagnosis is made on clinical grounds as no consistent laboratory test has been identified. Chromosome studies have been reported for only three patients with RTS and in two of these three, trisomy 8 mosaicism was found. We performed a variety of cytogenetic and molecular genetic studies on two siblings with RTS and on their phenotypically normal parents. Two chromosomally abnormal clones involving either trisomy 8 or i(8q) were found in both patients with RTS. These clones were present in vivo, as they were seen in interphase buccal smears and lymphocytes from unstimulated preparations using both conventional cytogenetic studies and fluorescence in situ hybridization (FISH) with a centromere probe for chromosome 8. These results suggest that RTS is associated with in vivo clonal chromosomal rearrangements causing an acquired somatic mosaicism. FAU - Lindor, N M AU - Lindor NM AD - Department of Medical Genetics, Mayo Clinic, Rochester, Minnesota 55905, USA. FAU - Devries, E M AU - Devries EM FAU - Michels, V V AU - Michels VV FAU - Schad, C R AU - Schad CR FAU - Jalal, S M AU - Jalal SM FAU - Donovan, K M AU - Donovan KM FAU - Smithson, W A AU - Smithson WA FAU - Kvols, L K AU - Kvols LK FAU - Thibodeau, S N AU - Thibodeau SN FAU - Dewald, G W AU - Dewald GW LA - eng PT - Case Reports PT - Journal Article PL - Denmark TA - Clin Genet JT - Clinical genetics JID - 0253664 SB - IM MH - Adolescent MH - Adult MH - Chromosome Aberrations MH - Female MH - Genes, p53 MH - Humans MH - In Situ Hybridization, Fluorescence MH - Karyotyping MH - Male MH - Mosaicism/*genetics MH - Pedigree MH - Rothmund-Thomson Syndrome/drug therapy/*etiology/*genetics MH - Sarcoma/complications/drug therapy 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] AID - 10.1111/j.1399-0004.1996.tb03270.x [doi] PST - ppublish SO - Clin Genet. 1996 Mar;49(3):124-9. doi: 10.1111/j.1399-0004.1996.tb03270.x.