Constitutional RUNX1 gene variants are associated with Familial Platelet Disorder (FPD) and predispose to a variety of hematological malignancies, included Acute Myeloid Leukemia (AML) and, albeit less frequently, Acute Lymphoblastic Leukemia (ALL). In this study, we report on a proband with primary diagnosis of AML, followed by T-ALL after transplant, and a positive familial history for leukemia over three generations. A new...