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1. Malignant neoplasm of blood-forming tissues; characterized by abnormal proliferation of leukocytes; one of the four major types of cancer
   - leukaemia [Brit, Cdn], leucaemia [Brit], cancer of the blood

Derived forms: leukemias

Type of: cancer, malignant neoplastic disease

Encyclopedia: Leukemia, feline Leukemia, erythroblastic, acute Leukemia, lymphocytic Leukemia, hairy cell Leukemia, b-cell Leukemia, B-Cell, chronic Leukemia Leukemia, T-Cell, chronic Leukemia, Myeloid Leukemia, neutrophilic, chronic Leukemia, myeloid, chronic Leukemia, t-cell Leukemia, promyelocytic, acute Leukemia, myeloid Leukemia, lymphocytic, chronic Leukemia, lymphocytic, acute Leukemia, myelocytic, acute Leukemia, monocytic, acute