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What tissues are likely to be affected by leukemia?
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Highly vascularized organs: liver, spleen, lymph, bone marrow
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What are some S/S of leukemia?
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Profound anemia
infection with left shift (increase in
immature neutrophils)
bleeding (petechiae anywhere that clothing
tight)
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What is the pathophysiology of leukemia?
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Unrestricted proliferation of immature WBCs that act like a "circulating tumor" and can send out "fingers" into different organ systems and then compete for metabolic elements causing destruction to tissue around it.
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With leukemia, what would you see in a complete WBC count?
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Leukocytosis (increased WBC count >10,000) with very low percentage of mature WBCs
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What is the end result of leukemic invasion of spleen, liver, and lypmph glands?
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Hepatosplenomegaly and fibrosis
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What is a possible cause of pathological fractures?
How?
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Leukemia
Invading leukemic cells into bone marrow causes weakening
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What is the chemotherapy Tx for acute lymphoid leukemia?
What is the goal?
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4-6 weeks
corticosteroids, vincristine, L-aspariginase and maybe doxorubicin
goal: remission or decrease cells to 5%
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What is the chemotherapy Tx for AML (ANLL)?
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Doxorubicin
daunomycin
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What are 3 Tx's for leukemia?
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Chemotherapy
steroids
hematopoietic stem cell transplantation (bone marrow transplant)
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What are the 3-5 phases of chemotherapy for leukemia?
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1)Induction therapy lasts 4-6 wks. Goal is to put into remission or decrease cells to 5%
2)Intesification therapy: after remission, Tx is intensified to eradicate remaining leukemic cells
3)Maintenance: daily and weekly IV,IM, and intrathecal meds for 2 yrs
4)Possible CNS prophylactic therapy
5)Possible relapse induction
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Why are steroids part of Leukemia Tx?
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Stop bone marrow from producing WBCs
counteract inflammation from chemo
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What therapy is only for high risk leukemia Pts? Explain.
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CNS prophylactic therapy:
intrathecal methotraxate and cytarabine
*injected into spinal column so X's blood-brain barrier for pts who have plaques in CSF or brain
*it can kill Pts, so needs lots of checks
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Who must be in the room during CNS prophylactic therapy for leukemia Pts?
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If the parent cannot handle being in the room, a play therapist or someone the child trusts must be there to help/hold hand/distract child
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What factors would indicate a better prognosis in a leukemia Pt?
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*Normal or low initial WBC count
*Onset at 2-9 yrs rather than before 2 or after 10
*female
*DNA index >1.16 and translocation of chromosomes 4 and 10
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What are chemotherapy drugs?
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Antimetabolites that affect fast proliferating cells such as hair, nail, GI, bone marrow cells
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