Thereafter, the patient suffered again from stage IVA [disseminated lymph nodes (LN), 1% to 2% bone marrow (BM) infiltration] relapse of the known AITL, which was molecularly characterized as ALK1-negative, TP53/17p del-negative, and TET2-positive. The gene discussed is TP53; the disease is angioimmunoblastic T-cell lymphoma.