TRBC1 and T-cell non-Hodgkin lymphoma: Moreover, Berg, et al. and Chen, et al. identified TRBC1 as a diagnostic marker for mature T-cell lymphomas that reliably assesses clonality in different types of samples [15,16], while Waldron, et al. validated TRBC1 as an effective test with a 97% concordance rate with PCR-based clonality tests [17].