PMID- 23098478 OWN - NLM STAT- MEDLINE DCOM- 20130418 LR - 20190606 IS - 2476-762X (Electronic) IS - 1513-7368 (Linking) VI - 13 IP - 8 DP - 2012 TI - Combined study of cytogenetics and fluorescence in situ hybridization (FISH) analysis in childhood acute lymphoblastic leukemia (ALL) in a tertiary cancer centre in South India. PG - 3825-7 AB - FISH is one of the most sensitive molecular methods to detect genetic abnormalities with DNA probes. When cytogenetic studies are normal or insufficient, FISH may detect cryptic rearrangements, rare or slowly proliferative abnormal populations in non-mitotic cells. We cytogenetically evaluated 70 childhood ALL - 67.1% were found to have an abnormal karyotype. The 23 patients (32.9%) with a normal karyotype were analyzed by FISH applying two probes; TEL/AML1 and MYB which detect cryptic rearrangements of t(12;21)(p13;q22) and deletion of (6q) respectively, associated with a good prognosis. Out of 23 patients, one was positive for t(12;21)(p13;q22) (4.3%). None of our patients were positive for MYB del(6q). Two patients showed an extra signal for MYB on chromosomes other than 6 (8.6 %) indicating amplification or duplication. Findings were compared with the available literature. Our study clearly indicated the integrated FISH screening method to increase the abnormality detection rate in a narrow range. FISH is less useful for diagnostic study of patients with suspected del(6q) but it helps in detecting known cryptic rearrangements as well as identification of new abnormalities(translocation , duplication and amplification) at the gene level. FAU - Mazloumi, Seyed Hashem Mir AU - Mazloumi SH AD - Department of Pathology, Kidwai Memorial Institute of Oncology, Bangalore, India. FAU - Madhumathi, D S AU - Madhumathi DS FAU - Appaji, L AU - Appaji L FAU - Prasannakumari AU - Prasannakumari LA - eng PT - Journal Article PL - Thailand TA - Asian Pac J Cancer Prev JT - Asian Pacific journal of cancer prevention : APJCP JID - 101130625 RN - 0 (Core Binding Factor Alpha 2 Subunit) RN - 0 (Oncogene Proteins, Fusion) RN - 0 (Proto-Oncogene Proteins c-myb) RN - 0 (TEL-AML1 fusion protein) SB - IM MH - Child MH - *Chromosome Aberrations MH - Chromosomes, Human, Pair 12/*genetics MH - Chromosomes, Human, Pair 21/*genetics MH - Core Binding Factor Alpha 2 Subunit/*genetics MH - *Cytogenetic Analysis MH - Female MH - Follow-Up Studies MH - Humans MH - *In Situ Hybridization, Fluorescence MH - India MH - Male MH - Oncogene Proteins, Fusion/*genetics MH - Precursor Cell Lymphoblastic Leukemia-Lymphoma/*genetics MH - Prognosis MH - Proto-Oncogene Proteins c-myb/genetics MH - Tertiary Care Centers EDAT- 2012/10/27 06:00 MHDA- 2013/04/20 06:00 CRDT- 2012/10/27 06:00 PHST- 2012/10/27 06:00 [entrez] PHST- 2012/10/27 06:00 [pubmed] PHST- 2013/04/20 06:00 [medline] AID - 10.7314/apjcp.2012.13.8.3825 [doi] PST - ppublish SO - Asian Pac J Cancer Prev. 2012;13(8):3825-7. doi: 10.7314/apjcp.2012.13.8.3825.