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A unique phenotype of T‐cell acute lymphoblastic leukemia in a patient with GATA2 haploinsufficiency

Germline or acquired mutations involving the GATA‐binding protein gene (GATA2) have been linked to a variety of clinical conditions. In addition, patients harboring GATA2 mutations have a striking predisposition to develop myeloid malignancies, such as myelodysplastic syndrome or acute myeloid leukemia, but not acute lymphoblastic leukemia (ALL). We report here a unique occurrence of early T‐cell precursor ALL in a young child with GATA2 haploinsufficiency.