has material basis in germline mutation in GATA1 inherited bleeding disorder, platelet-type GATA1-related cytopenia https://github.com/monarch-initiative/mondo/issues/9994 MEDGEN:335283 GARD:0026040 UMLS:C1845837 MONDO:0100089 A heterogeneous inherited disorder marked by varying combinations of thrombocytopenia, dyserythropoietic anemia, macrothrombocytopenia, β‑thalassemia‑like red‑cell abnormalities, and/or neutropenia, reflecting impaired transcriptional regulation of erythroid and megakaryocytic development. Affected individuals may present with mucocutaneous bleeding, anemia, abnormal platelet morphology, or multilineage cytopenias, with severity ranging from isolated thrombocytopenia to syndromic tri‑lineage involvement. GATA1-related cytopenia GATA1-related X-linked cytopenia inherited thrombocytopenia