PMID- 9599647 OWN - NLM STAT- MEDLINE DCOM- 19980625 LR - 20111117 IS - 0003-3995 (Print) IS - 0003-3995 (Linking) VI - 41 IP - 1 DP - 1998 TI - Unusual de novo t(13;15)(q12.1;p13) translocation leading to complex mosaicism including jumping translocation. PG - 22-6 AB - We report on a patient with neurosensory deafness, cataract and moderate mental retardation showing a constitutional mosaicism with the predominant cell line consisting of a 45,XY,-13,-15,+t(13;15) translocation of the Robertsonian type. By means of fluorescence in situ hybridization (FISH) using a panel of acrocentric pericentromeric probes and various banding techniques, the breakpoints in the translocation were determined at 13q12.1 and 15p13 respectively. Five other cell lines were present, at low percentage, one of them showing a t(13;15) tandem translocation. Interstitial telomeric sequences could be detected at the translocation fusion sites in both the Robertsonian and tandem translocations. The mosaicism appears therefore to be a consequence of chromosomal instability involving the t(13;15) fusion region of the predominant cell line, and related to the presence of interstitial telomeric sequences. The present observation suggests that in the pericentromeric 13q12 region, a gene involved in neurosensory deafness may be located. FAU - Petit, P AU - Petit P AD - Center for Human Genetics, University Hospital Leuven, Belgium. FAU - Devriendt, K AU - Devriendt K FAU - Vermeesch, J R AU - Vermeesch JR FAU - De Cock, P AU - De Cock P FAU - Fryns, J P AU - Fryns JP LA - eng PT - Case Reports PT - Journal Article PL - Netherlands TA - Ann Genet JT - Annales de genetique JID - 0370562 SB - IM MH - Cataract/congenital/*genetics MH - Chromosome Banding MH - Chromosomes, Human, Pair 13/*genetics MH - Deafness/*genetics MH - Humans MH - In Situ Hybridization, Fluorescence MH - Infant, Newborn MH - Intellectual Disability/*genetics MH - Male MH - Mosaicism/*genetics MH - Telomere/ultrastructure MH - Translocation, Genetic/*genetics EDAT- 1998/05/26 00:00 MHDA- 1998/05/26 00:01 CRDT- 1998/05/26 00:00 PHST- 1998/05/26 00:00 [pubmed] PHST- 1998/05/26 00:01 [medline] PHST- 1998/05/26 00:00 [entrez] PST - ppublish SO - Ann Genet. 1998;41(1):22-6.