Cytogenetics in multiple myeloma: a multicenter study of 24 patients with t(11;14)(q13;q32) or its variant.
Twenty-two patients with multiple myeloma (MM) with a classical t(11;14)(q13;q32) and two complex variants also involving 11q13 and 14q32 regions are reported. We show that t(11;14) (q13;q32) is predominantly noticed in stages II and III and never in stage I patients. Translocation (11;14)(q13;q32) is predominantly observed in hypodiploid or pseudodiploid clones associated with total or partial monosomy of chromosome 13 and additional structural changes in chromosome 1. These translocations may be discovered not only in standard cultures (24-48 hours) without stimulation, but also in cytokine-stimulated cultures (granulocyte macrophage colony-stimulating factor and interleukin 6). The t(11;14)(q13;q32) as a primary or secondary event in MM is discussed, because, in one patient, it was only discovered at relapse.
Service de Génétique Médicale, Hôpital Jeanne de Flandres, Lille, France.
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JL
Laï
L
L
Michaux
N
N
Dastugue
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F
Vasseur
A
A
Daudignon
T
T
Facon
F
F
Bauters
M
M
Zandecki
D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D002880:Chromosomes, Human, Pair 11; D002883:Chromosomes, Human, Pair 14; D005260:Female; D006801:Humans; D007621:Karyotyping; D008297:Male; D008875:Middle Aged; D009101:Multiple Myeloma / Q000235:genetics*; D014178:Translocation, Genetic