Mast Cell Leukemia (MCL) is the rarest form of systemic mastocytosis. a rare group of neoplastic disease that result from clonal proliferation of mast cells and their accumulation in one or more organ systems. The diagnosis of MCL is made by meeting the World Health Organization (WHO) 2017 criteria. MCL is further subclassified as leukemic or aleukemic based on presence or absence of ... https://www.spidertattooz.com/