This document provides an overview of leukemia, including its definition, types, causes, symptoms, diagnosis, treatment, and nursing management. It discusses the main types of leukemia - acute lymphocytic leukemia, acute myeloid leukemia, chronic lymphocytic leukemia, and chronic myeloid leukemia. For each type, it covers clinical manifestations, diagnostic evaluation, medical management options like chemotherapy and stem cell transplantation, and associated nursing care. The document also reviews the TNM staging system and mentions a research study on imatinib therapy for chronic myeloid leukemia.