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A Case of Adult B Lymphoblastic Leukemia with ider(9)(q10)t(9;22)(q34;q11.2) and der(19)t(1;19)(q23;p13.3)

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대한진단검사의학회 (Korean Society For Laboratory Medicine)|2010.12|Annals of Laboratory Medicine|제30권 제6호|pp. 585-590

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키워드

Recurrent cytogenetic abnormalitiesB lymphoblastic leukemiaider(9)(q10)t(9;22)der(19)t(1;19)
주제분류병리학

초록

In B lymphoblastic leukemia/lymphoma (B-ALL/LBL), t(9;22)(q34;q11.2) and t(1;19)(q23;p13.3) are recurrent cytogenetic abnormalities. The concurrent occurrence of both abnormalities is very rare, and only 3 cases have been previously reported. Here, we report a case of adult B-ALL with ider(9)(q10)t(9;22)(q34;q11.2) and der(19)t(1;19)(q23;p13.3). A literature review revealed that ider(9) (q10)t(9;22) is a rare variant of t(9;22) with a deletion of the short arm of chromosome 9. Fifteen cases of ider(9)(q10)t(9;22) have been reported. This abnormality is specific to precursor B-lymphoid neoplasms,such as B-ALL or B-lymphoid blast phase of CML, and is associated with disease progression or short survival. The cytogenetic abnormality t(1;19) is also specific to B-ALL. In most instances of t(1;19), TCF3 is fused to PBX1; however, a few cases have identical translocations but no TCF3-PBX1 fusion, as was observed in our patient. We describe the first case of ider(9)(q10)t(9;22) in combination with TCF3-PBX1 negative t(1;19). The patient underwent imatinib therapy in addition to intensive chemotherapy, but failed to achieve remission. (Korean J Lab Med 2010;30:585-90)

Abstract

In B lymphoblastic leukemia/lymphoma (B-ALL/LBL), t(9;22)(q34;q11.2) and t(1;19)(q23;p13.3) are recurrent cytogenetic abnormalities. The concurrent occurrence of both abnormalities is very rare, and only 3 cases have been previously reported. Here, we report a case of adult B-ALL with ider(9)(q10)t(9;22)(q34;q11.2) and der(19)t(1;19)(q23;p13.3). A literature review revealed that ider(9) (q10)t(9;22) is a rare variant of t(9;22) with a deletion of the short arm of chromosome 9. Fifteen cases of ider(9)(q10)t(9;22) have been reported. This abnormality is specific to precursor B-lymphoid neoplasms,such as B-ALL or B-lymphoid blast phase of CML, and is associated with disease progression or short survival. The cytogenetic abnormality t(1;19) is also specific to B-ALL. In most instances of t(1;19), TCF3 is fused to PBX1; however, a few cases have identical translocations but no TCF3-PBX1 fusion, as was observed in our patient. We describe the first case of ider(9)(q10)t(9;22) in combination with TCF3-PBX1 negative t(1;19). The patient underwent imatinib therapy in addition to intensive chemotherapy, but failed to achieve remission. (Korean J Lab Med 2010;30:585-90)

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