Elsewhere, Mohsen et al. reported that the number of memory B cells, which can express granzyme B (GZMB), was smaller in metastatic as compared with non-metastatic lymph nodes, and this hence emphasized the importance of GZMB + b cells in patients with breast invasive ductal carcinoma (Arabpour et al., 2019; Chesneau et al., 2020). The gene discussed is GZMB; the disease is invasive ductal breast carcinoma.