PMID- 16631472 OWN - NLM STAT- MEDLINE DCOM- 20060525 LR - 20071115 IS - 0165-4608 (Print) IS - 0165-4608 (Linking) VI - 166 IP - 2 DP - 2006 Apr 15 TI - Metaphase cells with normal G-bands have cryptic interstitial deletions in 13q14 detectable by fluorescence in situ hybridization in B-cell chronic lymphocytic leukemia. PG - 152-6 AB - Interphase fluorescence in situ hybridization (FISH) studies with D13S319 show that deletions of 13q14 are common in B-cell chronic lymphocytic leukemia (B-CLL). In contrast, conventional cytogenetic studies in B-CLL seldom reveal abnormalities of chromosome 13. We hypothesized that chromosome 13 anomalies might not be detected because they are caused by cryptic deletions rather than by the absence of dividing B-CLL cells. To investigate this possibility, we used FISH with D13S319 to study metaphases from 12 patients known to have 13q- by interphase FISH. These same patients had normal chromosomes by conventional cytogenetic studies. As a result of this study, we report evidence that B-CLL metaphases with 13q- are not detected because these deletions are often cryptic and not visible by standard G-banding. FAU - Stockero, Kimberly J AU - Stockero KJ AD - Cytogenetics Laboratory, Mayo Clinic, Rochester, MN 55905, USA. FAU - Fink, Stephanie R AU - Fink SR FAU - Smoley, Stephanie A AU - Smoley SA FAU - Paternoster, Sarah F AU - Paternoster SF FAU - Shanafelt, Tait D AU - Shanafelt TD FAU - Call, Timothy G AU - Call TG FAU - Zent, Clive S AU - Zent CS FAU - Van Dyke, Daniel L AU - Van Dyke DL FAU - Kay, Neil E AU - Kay NE FAU - Dewald, Gordon W AU - Dewald GW LA - eng PT - Journal Article PL - United States TA - Cancer Genet Cytogenet JT - Cancer genetics and cytogenetics JID - 7909240 SB - IM MH - Aged MH - Aged, 80 and over MH - Chromosome Aberrations MH - Chromosome Banding/*methods MH - *Chromosome Deletion MH - Chromosomes, Human, Pair 13/*genetics MH - Cohort Studies MH - Female MH - Humans MH - In Situ Hybridization, Fluorescence MH - Leukemia, Lymphocytic, Chronic, B-Cell/*genetics/*pathology MH - Male MH - Metaphase/*genetics MH - Middle Aged EDAT- 2006/04/25 09:00 MHDA- 2006/05/26 09:00 CRDT- 2006/04/25 09:00 PHST- 2005/09/01 00:00 [received] PHST- 2005/10/25 00:00 [revised] PHST- 2005/10/31 00:00 [accepted] PHST- 2006/04/25 09:00 [pubmed] PHST- 2006/05/26 09:00 [medline] PHST- 2006/04/25 09:00 [entrez] AID - S0165-4608(05)00663-1 [pii] AID - 10.1016/j.cancergencyto.2005.10.011 [doi] PST - ppublish SO - Cancer Genet Cytogenet. 2006 Apr 15;166(2):152-6. doi: 10.1016/j.cancergencyto.2005.10.011.