immunochemistry profiles dr. thomas williams. tests diseases cases
TRANSCRIPT
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IMMUNOCHEMISTRYPROFILES
Dr. Thomas Williams
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TESTS
DISEASES
CASES
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PARAPROTEIN
MONOCLONAL PROTEIN
M PROTEIN
PROTEIN SPIKE
M SPIKE
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TESTS
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Serum Protein Electrophoresis: Uses
Protein Profile
1. General Medical Diseases
2. Defect Dysproteinemias
3. Humoral Immunodeficiency
4. Paraprotein Detection
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Quantitative Assays: Uses
1. Confirm protein abnormalities suspected by serum protein electrophoresis
2. Monitor or follow known conditions
3. Confirm clinically suspected conditions
4. Identify paraproteins noted by electrophoresis
5. Says “Nothing” about monoclonality of immunoglobulins measured
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Immunofixational Electrophoresis/ Immunoelectrophoresis: Qualitatively Identifies Proteins
• Paraproteins: Heavy and light chains
• Other proteins
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Diseases – General Medical
(Non-Paraprotein Associated)
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Acute Phase Reactants
Haptoglobin
Alpha, -Antitrypsin
Alpha, -Acid Glycoprotein
C-Reactive Protein
C3
Ceruloplasmin
Albumin
Transferrin
Prealbumin
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Selective Deficiencies
Must Do Quantitative Assays
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Diseases:Paraprotein Associated
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MGUS
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Multiple Myeloma
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Multiple Myeloma
> 2 g/dL spike (or 3 g/dL)
< Normal Immunoglobulins
5-10% or > Marrow plasma cells
Bone lesions
Anemia
Other
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Waldenstrom’s
Macroglobulinemia
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IgM Monoclonal Gammopathy (“Macroglobulinemia of Waldenstrom”)
80%: Fatigue, weakness, weight loss, lymphadenopathy, hepatosplenomegaly. Lymphocytes, plasmacytoid lymphocytes, plasma cells, admixed large cells. 1 in 10 develops localized or terminal disseminated large cell lymphoma.
10%: CLL with or without appreciable plasmacytoid features.
10%: Classic multiple myeloma with neoplastic plasma cells predominating.
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IgM Monoclonal Gammopathy (“Macroglobulinemia of Waldenstrom”)
Common to all:
Reduced levels of other Ig classes.
+ bleeding diathesis, + visual disturbances andocular abnormalities
+ cold agglutinins (Raynaud’s syndrome, pupura),
+ hyperviscosity
B-J proteinuria usually at low level. Amyloidosis < 10%
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Hyperviscosity Syndrome
• Symptoms include chronic nasal bleeding and oozing from the gums, blurring or loss of vision, dizziness, headaches, vertigo
• Most patients have symptoms when the relative serum viscosity reaches 6 or 7 (normal less than 1.8)
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Hyperviscosity SyndromeContinued
• Most common causes of hyperviscosity syndrome are macroglobulinemia of Waldenstrom and IgA myeloma
• Treatment consists of plasmapheresis
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Alpha, Mu, Gamma
Heavy Chain Disease
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Cases
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Serum MG Evaluation
SPE + IEP
SPE + IFE
SPE + QUANT Ig (WITH K/L) +/- IFE/IEP
QUANT Ig WITH K/L
OTHER