Korean J Lab Med.  2006 Jun;26(3):223-226. 10.3343/kjlm.2006.26.3.223.

A Case of Acute Lymphoblastic Leukemia with ider(9)(q10)t(9;22)(q34;q11.2)

• Huh J
• Chung W

• KMID: 2238891
• DOI: http://doi.org/10.3343/kjlm.2006.26.3.223

Abstract

ider(9)(q10)t(9;22)(q34;q11.2) is an isochromosome for the long arm of a derivative chromosome 9 generated by a t(9;22), resulting from the deletion of the short arm of chromosome 9. It is known to be rarely observed in acute lymphoblastic leukemia (ALL) or lymphoblastic crisis transformed from chronic myelogenous leukemia. We herein describe a 26-year-old female patient with precursor B-cell ALL, cytogenetically characterized by ider(9)(q10)t(9;22). Fluorescence in situ hybridization analysis showed two ABL-BCR fusion signals on the derivative chromosome 9 and one BCR-ABL fusion signal on the derivative chromosome 22. Although a t(9;22) and a deletion of the short arm of chromosome 9 are known to be associated with a poor prognostic factor in acute lymphoblastic leukemia, a larger study is needed to determine the prognosis of ider(9)(q10)t(9;22) cases.

Keyword

Acute lymphoblastic leukemia; ider(9)(q10)t(9;22); Deletion of the short arm of chromosome 9; t(9;22); Fluorescence in situ hybridization; BCR-ABL

MeSH Terms

Adult
Arm
Chromosomes, Human, Pair 22
Chromosomes, Human, Pair 9
Female
Fluorescence
Humans
In Situ Hybridization
Isochromosomes
Leukemia, Myelogenous, Chronic, BCR-ABL Positive
Precursor Cell Lymphoblastic Leukemia-Lymphoma*
Precursor Cells, B-Lymphoid
Prognosis