Comparison of CD19 and CD56 expression in plasma cells of monoclonal gammopathy of undetermined significance (MGUS). The top row shows CD19 expression in polytypic (yellow) and neoplastic (red) plasma cells in three different MGUS cases. The corresponding CD56 expression is demonstrated in the bottom row.
Olteanu et al. BMC Clinical Pathology 2008 8:13 doi:10.1186/1472-6890-8-13