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Chromosome Preparation From Cultured Cells
Published on: January 28, 2014
A new cytogenetic abnormality, t(2;7)(q33;q36), in acute promyelocytic leukemia
Satsuki Owatari1, Kimiharu Uozumi, Kouichi Haraguchi
1Department of Hematology & Immunology, Kagoshima University, Sakuragaoka 8-35-1, Kagoshima 890-8520, Japan. owatari@kagomc2.hosp.go.jp
Abstract:
We report the case of a patient with acute promyelocytic leukemia (APL) carrying a novel chromosomal abnormality, t(2;7)(q33;q36). The 54-year-old woman was morphologically diagnosed with APL through bone marrow aspiration. The proportion of blast cells in bone marrow was 78%, including cells displaying Auer rods and faggot cells. Chromosomal analysis revealed the karyotype 46,XX,t(2;7)(q33;q36)[17]/46,XX[3]. The t(15;17) was not detected with conventional cytogenetic analysis. However, reverse transcriptase-polymerase chain reaction revealed the presence of a PML/RARA fusion gene. Cells displaying t(2;7)(q33;q36) disappeared after complete remission was achieved, using induction chemotherapy. Although several additional chromosomal abnormalities have been reported, this t(2;7)(q33;q36) without the classic t(15;17) represents a novel chromosomal abnormality associated with APL.
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