Liu Y, Zhai Y, Zhang Y, Cheng W, Li Y. Precursor B-cell lymphoblastic leukemia with surface immunoglobulin light chain expression in 2 chinese patients.
Acta Haematol 2013;
130:188-91. [PMID:
23774652 DOI:
10.1159/000347165]
[Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2012] [Accepted: 01/04/2013] [Indexed: 11/19/2022]
Abstract
BACKGROUND
Precursor B-cell acute lymphocytic leukemia (ALL) with surface immunoglobulin light chain expression is a rare disease entity. The differential diagnosis is difficult but critical for disease management.
AIMS
We report 2 cases (1 adult and 1 infant) of precursor B-cell ALL who presented at diagnosis with surface immunoglobulin light chain expression revealed by flow cytometric immunophenotyping and discuss its clinical significance.
CASE REPORT
The 2 patients presented with nonspecific symptoms such as fever, pallor, fatigue or lymphadenopathy. Flow cytometric immunophenotyping showed that both patients expressed CD34/CD19/CD10/CD22/CD9/HLA-DR/CD38/CD123/CD13 (partial) and had unexpected single λ light chain expression. Cytogenetic analysis revealed t(9;22)(q34;q11) in the adult patient and normal karyotype in the infant. Both cases were diagnosed and managed as precursor B-ALL, and the patients showed good response to treatment regimens.
CONCLUSION
We describe 2 cases of precursor B-ALL with unexpected surface light chain expression. The exceedingly rare immunophenotypes have diagnostic implication for immunophenotyping of this malignancy. Treatment regimens for precursor B-cell ALL are suitable for such cases.
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