Restricted Expression of the Constant Region 1 of T‐Cell Receptor β by Flow Cytometry Facilitates Detection of T‐Cell Neoplasms With High Specificity but Moderate Predictive Value

Including TRBC1 antibodies in a routine flow cytometry panel facilitates the identification of T-cell neoplasms. The analysis must be interpreted within its clinical context since T-cell lymphomas with a small and sometimes surface CD3-negative neoplastic T cell population, may display normal patterns of TRBC1-expression with a background of reactive T cells. Conversely, monotypic T-cells can be found in the absence of T-cell neoplasm.