title: Cytogenetic triclonality in T-cell acute lymphoblastic leukemia: a conventional and molecular cytogenetic study.
abstract: Cytogenetically-unrelated clones are infrequently seen in hematologic malignancies, and are particularly uncommon in acute lymphoblastic leukemia. We report a case of T-cell acute lymphoblastic leukemia with L2 morphology which demonstrated three cytogenetically distinct clones: 46,XY,t(2;9)(p21;q34)/46,XY,del(6)(q21q23)/47,XX,+8. Interphase cytogenetic analysis by fluorescence in situ hybridization (FISH) confirmed the presence of trisomy 8 in a significant proportion of lymphoblasts, while reverse transcription-polymerase chain reaction (RT-PCR) did not show the presence of BCR/ABL fusion. This is the first report describing the occurrence of cytogenetic triclonality in de novo T-cell acute lymphoblastic leukemia.
authors.affiliation: Department of Pathology, Queen Elizabeth Hospital, Hong Kong, S. A. R. China.
authors.forename: K F
authors.initials: KF
authors.lastname: Wong
authors.forename: C C
authors.initials: CC
authors.lastname: So
authors.forename: L P
authors.initials: LP
authors.lastname: Siu
mesh_terms: D002648:Child; D002869:Chromosome Aberrations; D002889:Chromosomes, Human, Pair 2; D002896:Chromosomes, Human, Pair 6; D002898:Chromosomes, Human, Pair 8; D002899:Chromosomes, Human, Pair 9; D020732:Cytogenetic Analysis; D017353:Gene Deletion; D020440:Gene Duplication; D006801:Humans; D017404:In Situ Hybridization, Fluorescence; D007621:Karyotyping; D015459:Leukemia-Lymphoma, Adult T-Cell / Q000235:genetics*; D008297:Male; D020133:Reverse Transcriptase Polymerase Chain Reaction; D014178:Translocation, Genetic