IWG-MRT Myelofibrosis Relapse

**Semantic type:** Finding

**Definition:** No longer meeting criteria for at least clinical improvement after achieving complete response partial response or clinical improvement or loss of anemia response persisting for at least 1 month or loss of spleen response persisting for at least 1 month (adapted from Revised Response Criteria for Myelofibrosis: International Working Group-Myeloproliferative Neoplasms Research and Treatment (IWG-MRT) and European LeukemiaNet (ELN) consensus report. BLOOD 22 AUGUST 2013 x VOLUME 122 NUMBER 8)