Mastocytosis, also known as malignant mast cell tumours, is related to mastocytosis, cutaneous and systemic mastocytosis with associated hematologic neoplasm, and has symptoms including exanthema and pruritus. An important gene associated with Mastocytosis is KIT (KIT Proto-Oncogene, Receptor Tyrosine Kinase), and among its related pathways/superpathways are ERK Signaling and MIF Mediated Glucocorticoid Regulation. The drugs Imatinib Mesylate and Omalizumab have been mentioned in the context of this disorder. Affiliated tissues include bone marrow and skin, and related phenotypes are growth/size/body region and normal