Previous case reports have demonstrated AITL following either a myeloid or lymphoid neoplasm derived from a common TET2/DNMT3A mutated stem cell population (Tiacci et al. 2018; Naganuma et al. 2020; Cheng et al. 2021; Attygalle et al. 2022; Yoshihara et al. 2022). The gene discussed is TET2; the disease is angioimmunoblastic T-cell lymphoma.