Transient myeloproliferative syndrome SNOMEDCT_US:450934005 Transient myeloproliferative disorder UMLS:C1834582 TMD A unique clonal neoplastic disorder that is linked to trisomy 21, is restricted to neonatal period, and spontaneously regresses. It often has characteristics of megakaryocytic lineage and is associated with GATA1 mutations in myeloblasts. Transient leukaemia of Down syndrome HP:0005534 Transient leukemia of Down syndrome Myeloproliferative disorder