Clinical and laboratory study of a complex translocation t (6; 21; 8) (p22; q22; q22) in two patients with acute myeloid leukemia / 中华血液学杂志

ABSTRACT

<p><b>OBJECTIVE</b>To investigate the clinical and laboratory characteristics of a complex translocation t (6; 21; 8) (p22; q22; q22) in two patients with acute myeloid leukemia.</p><p><b>METHODS</b>Bone marrow (BM) samples were collected at presentation, prepared by short-term (24 hours) unstimulated culture and R-binding, for conventional cytogenetic assay (CCA). The complex translocation was assayed by fluorescence in situ hybridization (FISH) with a dual-color AML1/ETO-specific probe. AML1/ETO chimeric transcript was detected by reverse transcription polymerase chain reaction (RT-PCR).</p><p><b>RESULTS</b>In both cases CCA demonstrated a complex translocation, t (6; 8; 21) (p22; q22; q22), which was confirmed by interphase and metaphase FISH and AML1/ETO fusion transcript was detected by RT-PCR. Both the two patients were diagnosed as AML-M(2), but with different immunophenotype and therapeutic outcome.</p><p><b>CONCLUSION</b>The t (6; 21; 8) (p22; q22; q22) is a rare variant of complex translocation of t (8; 21) (q22; q22). More such cases are needed for elucidating its clinical features and prognosis.</p>