hematology alterations: altered leukocyte …courses.justice.eku.edu/nsc834a/ppt/lesson4/834...
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Mary DeLetter, PhD, RNAssociate ProfessorDept. of Baccalaureate and Graduate NursingEastern Kentucky University
Hematology Alterations:Altered Leukocyte FunctionAltered Lymphoid Function
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Alterations in Leukocyte Function
QuantitativeDecreased production in bone marrowAccelerated destruction of circulating WBCResponse to infections
QualitativeDisruption in function
↓ phagocytosis: granulocytes, monocytes, macrophages↓ antigen response: lymphocytesInfectious mononucleosisCancer: leukemia, myeloma 2
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Quantitative Alterations
-cytosis: ↑ WBC count (>10,000/mm3)
-philia: ↑ WBC count -penia: ↓ WBC count (<3,500/mm3)
LeukocytosisNormal response to physiologic stress
Leukopenia↑ infection riskEndogenous or exogenous causes
Hemocytoblast
MyeloblastMonoblast Lymphoblast
Progranulocyte
. . .
Basophil
NeutrophilicMyelocyte
EosinophilicMyelocyte
BasophilicMyelocyte
Eosinophil Neutrophil LymphocyteMonocyte
Granulocytes
Leukocyte Development
Agranulocytes
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Granulocytes
NeutrophiliaEarly stages of infection or inflammation
NeutropeniaSevere prolonged infectionsAbsence of infection:
↓ neutrophil production↓ neutrophil survivalAbnormal neutrophil distribution/sequestration
NeutrophilsEosinophilsBasophils
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Granulocytes
NeutropeniaPrimary Congenital
Immunodeficiencies – ↓ neutrophil productionPrimary Acquired
Hematologic disordersAnorexia/starvation
SecondaryMalignanciesChemotherapyImmunosuppressive drugs
NeutrophilsEosinophilsBasophils
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Granulocytes
EosinophiliaAllergic disordersParasitic infections↑ Tryptophan ingestionFibromyalgia Syndrome
EosinopeniaMigration of eosinophils to inflammatory siteHypercortisol secretion (Cushing syndrome)
NeutrophilsEosinophilsBasophils
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Granulocytes
BasophiliaInflammationImmediate hypersensitivity reactionsMyeloproliferative disorders
Basopenia (basophilic leukopenia)HyperthyroidismAcute infectionsHypercortisol (exogenous)Ovulation/pregnancy
NeutrophilsEosinophilsBasophils
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Agranulocytes
MonocytosisBacterial infectionsChronic infectionsMyocardial damage (MI)
MonocytopeniaRare
MonocytesLymphocytes
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Agranulocytes Lymphocytosis
Acute viral infections – Epstein-BarrRare in bacterial infections
LymphocytopeniaAltered lymphocyte production
NeoplasmsImmune deficiencies
Lymphocyte destruction Drugs, radiationViruses, HIVAutoimmune
MonocytesLymphocytes
Other Conditions Associated with Leukophilias &Leukopenias
Table 29-1
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Infectious Mononucleosis
Infection of B-lymphocytesAcute, self-limitingTransmission
Saliva (personal contact)Incubation: 30-50 days85% of cases - Epstein-Barr virus
B cells have an EBV receptor siteOther viral causes:
Cytomegalovirus (CMV), hepatitis, influenza, HIV
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Infectious Mononucleosis
Signs and symptoms: FeverSore throatCervical lymphadenopathy↑ lymphocyte countAtypical lymphocytes
Serious complications are infrequent (<5%)Splenic rupture is the most common cause of death
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Leukemia
CharacteristicsMalignant disorder of the lymphocytes and blood-forming organs
Excessive accumulation of malignant leukocytes
Overcrowding of bone marrow
↓ production of normal hematopoietic cells
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Leukemias
Acute leukemiaPresence of undifferentiated or immature cells, usually blast cells
Acute lymphocytic leukemia (ALL)> 30% lymphoblasts in bone marrow or blood
ChildrenMean age = 13>95% of children have remission
Adults 20% of ALL casesGreater mortality than children
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Leukemias
Acute myelogenous leukemia (AML)Causes:
Abnormal proliferation of myeloid precursor cells↓ ApoptosisLoss of cellular differentiation
PathophysiologyLeukocytosisPredominance of blast cells
OccurrenceAdults – mean age 67
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LeukemiasChronic leukemia
Predominant cell is mature but does not function normally30% of leukemia cases
Chronic lymphocytic leukemia (CLL)Pathophysiology
Malignant transformation and Slow ↑B lymphocytesCancerous cells spread from the bone marrow to the bloodInvolves lymph nodes
OccurrenceAdults > 50
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Leukemias
Chronic myelogenous leukemia (CML)Definition
↑ myeloid cell production in bone marrowCauses
Philadelphia chromosomesTranslocation of chromosomes 9 and 22Found in the affected WBC Allows uncontrollable cell growth
High dose radiation treatmentsOccurrence
Children and middle-age adults.
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LeukemiaClinical manifestations
__________________Leukemiapictures.org
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Myeloma
Proliferation of hematopoietic cells (bone marrow)
Solitary or multifocal tumors (multiple myeloma)
Malignant plasma cells produce abnormally large amounts immunoglobulin (Bence-Jones proteins)
Pass through the glomerulus and damage renal tubular cells
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Myeloma
Multiple myeloma causes increased osteoclastic bone destruction
Clinical manifestationsCortical (outer) and medullary (inner) bone lossSkeletal painRecurring infections - ↓humoral immune response
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Lymphadenopathy
Enlarged lymph nodes that become palpable and tender
Local lymphadenopathyDrainage of an inflammatory lesion located near the enlarged node
General lymphadenopathyMalignant or nonmalignant disease
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Malignant LymphomasProliferation of malignant lymphocytes in lymphoid system.
Hodgkin lymphomaReed-Sternberg cells in the lymph nodes
Large, multinucleated or bilobular nucleusAdenopathy, mediastinal mass, splenomegaly, and abdominal massPrognosis good
OccurrenceBoth children and adults
Early adulthood (ages 15 to 40, especially in a person’s 20s) Late adulthood (after age 55).
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Malignant Lymphomas
Non-Hodgkin lymphomasTypes
B-cellsT-cellsSlow-growingFast-growing
OccurrenceEqual in males and females95% in adults
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Alteration in Platelet Function
ThrombocytopeniaPlatelet count < 150,000 platelets/mm3
Causes:↓ platelet production in bone marrow↑ breakdown intravascular platelets↑ breakdown of extravascular platelets in spleen or liver
Hematology Alterations:Altered Leukocyte FunctionAltered Lymphoid Function