A total of 154 TET2 mutations were seen in 94 cases of AITL and PTCL‐FTH, and 118 (77%) of these mutations were frameshift indels or nonsense changes, and rather widely distributed, predicting variably truncated protein products (supplementary material, Figure S1). The gene discussed is FTH1; the disease is angioimmunoblastic T-cell lymphoma.