This study aimed to investigate the clinical characteristics and prognostic impact of 1q21 gain in patients with newly diagnosed multiple myeloma (MM).
This was a retrospective study of 197 patients with newly diagnosed MM. Fluorescence in situ hybridization was performed to detect six cytogenetic abnormalities: gain(1q21), del(17p), del(13q14), t(4;14), t(14;16), and t(11;14).
We showed that 57.8% of patients with MM had 1q21 gain. The patients with 1q21 gain had lower IgM (0.39 vs 1.14 g/L, P = 0.037) and higher platelet count (177.62109/l vs 148.29109/l, P = 0.018) than those without 1q21 gain, and were more likely to be accompanied by del(13q14) (P < 0.001) or t(4;14) (P = 0.017).
We showed that 1q21 gain was associated with del(13q14) and t(4;14) increase, but it had no effect on prognosis of patients with newly diagnosed MM.