Table 1.

Expression of surface markers that help differentiate between normal and aberrant plasma cells using flow cytometry

	CD38	CD138	CD81	CD27	CD45	CD19	CD20	CD56	CD117	CD28
Normal plasma cells	Strong	Strong	Strong	Strong	Variable	Variable	No expression	No expression	No expression	No expression
Abnormal plasma cells	Lower expression	Strong	Low or no expression	Low or no expression	Low or no expression	Low or no expression	Strong or variable	Strong or variable	Strong or variable	Strong or variable