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 ORIGINAL ARTICLE
Year : 2003  |  Volume : 40  |  Issue : 4  |  Page : 135-139

Cytogenetics and fluorescence In-situ hybridization in detection of hematological malignancies


1 FRIGE, Genetic Centre, 20/1, Bima Nagar, Satellite, Ahmedabad - 380015, India
2 DAPEG Sezione Di Genetica, Instituto Di GeneticaVia Amendola, 165/A, 70126 Bari, Italy

Correspondence Address:
VinSheth J Frenny
FRIGE, Genetic Centre, 20/1, Bima Nagar, Satellite, Ahmedabad - 380015
India
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Source of Support: None, Conflict of Interest: None


PMID: 14716109

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BACKGROUND : The technique of Fluorescence In-Situ Hybridization (FISH), a hybrid of cytogenetics and molecular biology has increased the resolution and application of cytogenetics in various neoplastic processes. In various types of leukemias, primary investigation by conventional cytogenetic [CC] technique followed by FISH has increased our understanding of the abnormal clonal formation involving different gene region. AIMS : Present study is aimed to use different kinds of in-house FISH probes in various hematological malignancies and its correlation with conventional cytogenetic finding. MATERIAL AND METHODS: Cytogenetic study was carried out in 360 patients either from peripheral blood or from bone marrow cells suspected for various types of leukemias. Four of 360 cases were further selected for FISH study by using different types of in-house probes, such as BAC [Bacterial Artificial Chromosome], PAC [Phague Artificial Chromosome], alphoid, PCP [Partial Chromosome Paint] and WCP [Whole Chromosome paint]. RESULTS : The results confirmed breakpoints of inversion 16 and del 16 in case 2 and 3 respectively. Whereas, case 1 did not confirm the cytogenetic findings of t(15;17) by PML/RARa fusion signals as multiple cell lines were involved in the patients. PCP and WCP were helpful in the identification of the marker chromosome in case 1. Telomeric and centromeric probes confirmed the cytogenetic findings of t(5;7) in case 4. CONCLUSION : We observe from this study that, in addition to the conventional cytogenetic study, FISH study provide further confirmation of chromosomal rearrangements. This facilitates our understanding of the neoplastic process more precisely for the better prognostification of the patient.






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