Primary macroglobulinemia with t(11;18)(q21;q21).
These are the first cases of primary macroglobulinemia (PMG) with t(11;18)(q21;q21) reported in the literature. The first case was a 77-year-old man with macroglobulinemia (serum IgM: 8.36 g/dL). Abnormal lymphoid cells were detected in the blood and bone marrow. Immunologic and karyotypic analyses revealed that abnormal cells were positive for surface IgM-k, CD19, and CD20, negative for CD5 and CD10, and all had a t(11;18)(q21;q21). The second case was a 57-year-old woman with macroglobulinemia (serum IgM: 12.0 g/dL). Abnormal lymphoid cells were detected in blood and marrow, and cells were positive for surface IgM-lambda, CD19, and CD20, and negative for CD5 and CD10. Plasma cells bearing cytoplasmic IgM-lambda were increased in pleural fluid. Karyotyping demonstrated t(2;11;18)(q21-23;q21;q21). Rearrangements within BCL2 and YES genes located at 18q21 were not detected. Sixteen other cases with t(11;18)(q21;q21) have been reported in marginal zone B-cell lymphoma. Therefore, our report is in agreement with the finding that part of primary macroglobulinemia is a variant of marginal zone B-cell lymphoma.
Hirase
N
N
Third Department of Internal Medicine, Faculty of Medicine, Kyushu University, Fukuoka, Japan.
Yufu
Y
Y
Abe
Y
Y
Muta
K
K
Shiokawa
S
S
Nawata
H
H
Nishimura
J
J
D000368:Aged; D002880:Chromosomes, Human, Pair 11; D002887:Chromosomes, Human, Pair 18; D005260:Female; D006801:Humans; D016130:Immunophenotyping; D007621:Karyotyping; D016393:Lymphoma, B-Cell / Q000235:genetics*; D008297:Male; D008875:Middle Aged; D018807:Polymorphism, Single-Stranded Conformational; D011518:Proto-Oncogene Proteins / Q000235:genetics; D019253:Proto-Oncogene Proteins c-bcl-2 / Q000235:genetics; D051575:Proto-Oncogene Proteins c-yes; D020133:Reverse Transcriptase Polymerase Chain Reaction; D014178:Translocation, Genetic; D008258:Waldenstrom Macroglobulinemia / Q000235:genetics*; D019061:src-Family Kinases
D011518:Proto-Oncogene Proteins; D019253:Proto-Oncogene Proteins c-bcl-2; D051575:Proto-Oncogene Proteins c-yes; D019061:src-Family Kinases