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immunosuppression, the immune-
                                                                competent cells of the donor recognize
                                                                the recipient’s cells as foreign and
                                                                mount an immune offense against
                                                                them.
                                                             b. Graft-versus-host disease is managed
                                                                cautiously with immunosuppressive
                                                                agents to avoid suppressing the new
                                                                immune system to such an extent that
                                                                the client becomes more susceptible to
                                                                infection, or the transplanted cells stop
                                                                engrafting.
                                             3. Hepatic veno-occlusive disease
                                                             a. The disease involves occlusion of the
                                                                hepatic venules by thrombosis or
                                                                phlebitis.
                                                             b. Signs include right upper quadrant
                                                                abdominal pain, jaundice, ascites,
                                                                weight gain, and hepatomegaly.
                                                             c. Early detection is critical because there
                                                                is no known way to open the hepatic
                                                                vessels.
                                                             d. The client will be treated with fluids
                                                                and supportive therapy.
                    VIII. Skin Cancer (see Chapter 42)
                    IX. Leukemia (Box 44-7)
                                A. Description
                                             1. Leukemias are a group of hematological malignancies
                                                involving abnormal overproduction of leukocytes,
                                                usually at an immature stage, in the bone marrow.
                                             2. The 2 major types of leukemia are lymphocytic
                                                (involving abnormal cells from the lymphoid
                                                pathway) and myelocytic or myelogenous (involving
                                                abnormal cells from the myeloid pathways).
                                             3. Leukemia may be acute, with a sudden onset, or
                                                chronic, with a slow onset and persistent symptoms
                                                over a period of years.
                                             4. Leukemia affects the bone marrow, causing anemia,
                                                leukopenia, the production of immature cells,
                                                thrombocytopenia, and a decline in immunity.
                                             5. The cause is unknown and appears to involve
                                                genetically damaged cells, leading to the
                                                transformation of cells from a normal state to a
                                                malignant state.
                                             6. Risk factors include genetic, viral, immunological, and
                                                environmental factors and exposure to radiation,
                                                chemicals, and medications, such as previous
                                                chemotherapy.



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