PMID- 9598794 OWN - NLM STAT- MEDLINE DCOM- 19980721 LR - 20191024 IS - 1045-2257 (Print) IS - 1045-2257 (Linking) VI - 22 IP - 2 DP - 1998 Jun TI - FISH identifies inv(16)(p13q22) masked by translocations in three cases of acute myeloid leukemia. PG - 87-94 AB - The inv(16)(p13q22) masked by different translocations was detected by fluorescence in situ hybridization (FISH) and confirmed by molecular analysis in three adult patients presenting with acute myeloid leukemia (AML)-M2 (cases 1 and 3) and M4Eo (case 2). Cytogenetic analysis revealed 47,XX,t(9;16)(p23;p13),+22 (case 1); 46,XX,t(1;16)(p32;p13) (case 2); and 46,XY,?del(16)(q22) (case 3). Using a panel of probes for chromosomes 1, 9, 16, and 20 as well as probes to detect inv(16), i.e., two cosmid contigs hybridizing proximally and distally to the 16p13 breakpoint, FISH demonstrated inv(16) involving the derivative 16 as well as reciprocal translocations between 16q22-qter and 9p24 (case 1), 1p32 (case 2), and 20q13 (case 3). In addition, a small interstitial del(16)(p13p13) proximal to the MYH11 breakpoint was detected in case 1. Reverse transcriptase-polymerase chain reaction (RT-PCR) and Southern blot analysis showed a CBFB-MYH11 fusion transcript and MYH11 rearrangement, respectively, in all three cases. We conclude that: 1) inv(16) can be masked by other structural abnormalities involving chromosome 16; 2) some of the so-called variant translocations not explored at the molecular level may in fact represent a masked inv(16); and 3) FISH, RT-PCR, and Southern blot analyses are reliable tools to detect masked inv(16) and should be applied in all AML cases with structural changes of chromosome 16. FAU - Dierlamm, J AU - Dierlamm J AD - Center for Human Genetics, University of Leuven, Belgium. FAU - Stul, M AU - Stul M FAU - Vranckx, H AU - Vranckx H FAU - Michaux, L AU - Michaux L FAU - Weghuis, D E AU - Weghuis DE FAU - Speleman, F AU - Speleman F FAU - Selleslag, D AU - Selleslag D FAU - Kramer, M H AU - Kramer MH FAU - Noens, L A AU - Noens LA FAU - Cassiman, J J AU - Cassiman JJ FAU - Van den Berghe, H AU - Van den Berghe H FAU - Hagemeijer, A AU - Hagemeijer A LA - eng PT - Case Reports PT - Journal Article PT - Research Support, Non-U.S. Gov't PT - Review PL - United States TA - Genes Chromosomes Cancer JT - Genes, chromosomes & cancer JID - 9007329 RN - 0 (Oncogene Proteins, Fusion) SB - IM MH - Adult MH - Blotting, Southern MH - *Chromosome Inversion MH - Chromosomes, Human, Pair 1/genetics MH - Chromosomes, Human, Pair 16/*genetics MH - Chromosomes, Human, Pair 20/genetics MH - Chromosomes, Human, Pair 9/genetics MH - Female MH - Humans MH - In Situ Hybridization, Fluorescence/*methods MH - Karyotyping MH - Leukemia, Myeloid, Acute/diagnosis/*genetics MH - Leukemia, Myelomonocytic, Acute/diagnosis/genetics MH - Male MH - Middle Aged MH - Oncogene Proteins, Fusion/genetics MH - Polymerase Chain Reaction MH - Translocation, Genetic/*genetics RF - 23 EDAT- 1998/05/23 02:18 MHDA- 2000/06/20 09:00 CRDT- 1998/05/23 02:18 PHST- 1998/05/23 02:18 [pubmed] PHST- 2000/06/20 09:00 [medline] PHST- 1998/05/23 02:18 [entrez] AID - 10.1002/(SICI)1098-2264(199806)22:2<87::AID-GCC1>3.0.CO;2-2 [pii] AID - 10.1002/(sici)1098-2264(199806)22:2<87::aid-gcc1>3.0.co;2-2 [doi] PST - ppublish SO - Genes Chromosomes Cancer. 1998 Jun;22(2):87-94. doi: 10.1002/(sici)1098-2264(199806)22:2<87::aid-gcc1>3.0.co;2-2.