Figure 1: (a) Bone marrow from a control patient (staging marrow) with plasma cells shown in green: CD38+, CD138+, CD19+, CD56-, CD45+, CD117-, CD81+, CD200-. CD19/CD56; dot plot shows three populations of plasma cells CD19 + CD56-(major, blue arrow); CD19+CD56+ (red arrow) and CD19-CD56+ (black arrow) both minor populations. (b) Bone marrow from a case of multiple myeloma with plasma cells shown in green. Both abnormal plasma cells (red arrow) and normal plasma cells (blue arrow) are shown. APC are kappa restricted while a cluster showing Lambda positivity is NPCs