NFKB1 and neoplasm: In tumor plasma cells, we observed at diagnosis a higher percentage of cells expressing NRF2 (22.9 ± 22.7) and NF-kB (21.7 ± 21.5) comparing with observed at remission time-point (NRF2: 7.0 ± 3.1; NF-kB: 4.3 ± 1.5).