TRGC1 and mature T-cell and NK-cell non-Hodgkin lymphoma: Results: TCRG and TCRB geneclonality assay was valuable in confirming diagnosis in 97% of PTCL patients.T-cell clonality assay performed on blood or bone marrow samples reaffirmedlymphoma in 93% of cases, whereas morphological methods were informative in 73%of cases only.