This presentation which addresses changes and updates in mastocytosis is based on the recently published International Consensus Classification of myeloid neoplasms (Arber DA, Orazi A, Hasserjian RP, et al. Blood 2022; 140: 1200–1228). Mastocytosis a neoplastic disease characterised by clonal proliferation mast cells, accumulate one or multiple organs. The includes three clinicopathologic types...