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Morphological findings of atypical plasmacytic cells in the peripheral blood (A). Analysis of marrow tumor cells from the present case using flow cytometry at disease onset. The tumor cells were gated using CD38-positive cells (B). Cytogenetic features of bone marrow cells (C). Altered karyotype by conventional G-banding (arrows): 46, XX, add(12)(q13), t(14;20)(q32;q11), add(22)(p11.2).
