TET2 is present in 50-90% of cases, DNMT3A and IDH2 are seen on 20% to 55% of cases (23) An inactivating RHOA mutation can be seen in 70% of TFH lymphoma -AITL subtype and usually co-occurs with TET2 mutations. Here, IDH2 is linked to angioimmunoblastic T-cell lymphoma.