The genetic landscape of inherited HM. The order of the 11 established germ line mutations is depicted based on their date of discovery. Mutations are broadly assigned to 3 groups according to phenotype: HMs alone (blue), associated bone marrow failure syndromes (red), or characteristic cytopenias and/or platelet dysfunction (yellow). The incidence of these mutations varies considerably with >10 pedigrees reported for mutations in RUNX1, TERC, CEBPA, TERT, ANKRD26, GATA2, and now DDX41 with, in certain families/genes, apparent clustering of myeloid and lymphoid malignancies.