A child with ALL and ETV6/AML1 fusion on a chromosome 12 due to an insertion of AML1 and loss of ETV6 from the homolog involved in a t(12;15)(p13;q15).
A 4-year-old boy was found to have acute lymphoblastic leukemia characterized by a t(12;15)(p13;q15). FISH investigation using a TEL(ETV6)/AML1 probe detected a fusion signal in 98% of the interphase cells. Sequential FISH on a G-banded slide showed a fusion signal on an apparently normal chromosome 12 and AML1 signals on chromosomes 21. The ETV6 was deleted from the chromosome 12 involved in the t(12;15). These results are best explained as an insertion of AML1 into TEL on one chromosome arm 12p and loss of ETV6 from the chromosome 12 involved in the t(12;15).
Reddy
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KS
Cytogenetics Department, Quest Diagnostics Inc., San Juan Capistrano, California. reddyk@questdiagnostics.com
Yang
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Mak
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Wang
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Johnston
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D002675:Child, Preschool; D002881:Chromosomes, Human, Pair 12 / Q000235:genetics*; D002884:Chromosomes, Human, Pair 15 / Q000235:genetics*; D050676:Core Binding Factor Alpha 2 Subunit; D004268:DNA-Binding Proteins / Q000235:genetics*; D006801:Humans; D008297:Male; D016254:Mutagenesis, Insertional / Q000235:genetics*; D009687:Nuclear Proteins / Q000235:genetics; D015514:Oncogene Proteins, Fusion / Q000235:genetics*; D054198:Precursor Cell Lymphoblastic Leukemia-Lymphoma / Q000209:etiology / Q000235:genetics*; D011518:Proto-Oncogene Proteins / Q000235:genetics*; D050783:Proto-Oncogene Proteins c-ets; D012097:Repressor Proteins; D014157:Transcription Factors / Q000235:genetics*; D014178:Translocation, Genetic; D000097764:ETS Translocation Variant 6 Protein
D050676:Core Binding Factor Alpha 2 Subunit; D004268:DNA-Binding Proteins; D009687:Nuclear Proteins; D015514:Oncogene Proteins, Fusion; D011518:Proto-Oncogene Proteins; D050783:Proto-Oncogene Proteins c-ets; D012097:Repressor Proteins; D014157:Transcription Factors; D000097764:ETS Translocation Variant 6 Protein; C102421:TEL-AML1 fusion protein