Post on 07-May-2015
description
Brad LewisSan Francisco General Hospital
Blood alone moves the wheels of history.
Benito Mussolini
Blood will tell, but often it tells too much.
Don Marquis
Anemia in the Patient with HIV
Goals of this Talk• How to Approach the Anemic Patient• Anemias specific to HIV
– Evaluating hemolysis– Iron Deficiency and CDA– G6PD– B12 Deficiency– Marrow Dysfunction
Anemia in HIV (EuroSIDA)
Mocroft A, AIDS 1999; 13:943–50
AnemiaAn Approach to Anemia
Evaluating HemolysisThe Bucket with The Hole
Evaluating HemolysisThe Bucket with The Hole
Reticulocytes
Retic #=1/mmRetic %= 20%
Retic # = 1/mmRetic % = 30%
Corr Retic = Retic x hgb/nl hgb
RPI = corrected retic. count/Maturation time (Maturation time = 1 for Hct=45%, 1.5 for 35%, 2 for 25%, and
2.5 for 15%.)
Retic Hi Retic Low
AnemiaAn Approach to Anemia
Retic Hi Retic Low
Anemia
MCV HiMCV NlMCV Lo
An Approach to Anemia
Retic Hi Retic Low
Anemia
Destruction Loss MCV HiMCV NlMCV Lo
IntrinsicExtrinsicSplenicMechanicalRecovery
TissueOn FloorOccult
Iron(Lead)ThalFrags
B12FolateLiverETOHThyroidToxicMDS
Chronic DiseaseRenalMixedMild/TreatedEarlyTransfusedEndocrineIntrinsic BMDilution
An Approach to Anemia
Retic Hi Retic Low
Anemia
Destruction Loss MCV HiMCV NlMCV Lo
Intrinsic Hgb’opathy Enzymopathy Membrane
HSPNH
ExtrinsicSplenicMechanicalRecovery
TissueOn FloorOccult
An Approach to Anemia
Retic Hi Retic Low
Anemia
Destruction Loss MCV HiMCV NlMCV Lo
IntrinsicExtrinsic AIHA
coldwarm
Drug/Toxins Sepsis BurnsSplenic/HepaticMechanical MAHA
TissueOn FloorOccultRecovery
Hemolysis Diagnosis
• Check the RETIC!• Confirmatory Testing
– LDH, Haptoglobin• 1% Population Ahaptoglobinemic
– Bilirubin
• Intravascular (massive)– Plasma Hgb– Urine Hemosiderin (Hemoglobinuria)
• The Hgb A1C of the hematologist
Specific Diagnostic Tests-High Retic
• Smear
• Coombs- Direct and Indirect– Does NOT diagnose hemolysis
• G6PD ASSAY (and Retic count)
• Hemoglobin Electropheresis???
What Else Could It Be?
• 56 yo Hawaiian male
• Hgb 7, WBC nl, MCV nl, Plt nl, LDH 320, Ind. Bili 2.1– Fe studies nl, B12/Folate nl, Coombs 4+IgG
– Well!
What Else Could It Be?
• 56 yo Hawaiian male
• Hgb 7, WBC nl, MCV nl, Plt nl, LDH 320, Ind. Bili 2.1– Fe studies nl, B12/Folate nl, Coombs 4+IgG
– Well!
• Given 12 mo prednisone without effect ---
What Else Could It Be?
• 56 yo Hawaiian male
• Hgb 7, WBC nl, MCV nl, Plt nl, LDH 320, Ind. Bili 2.1– Fe studies nl, B12/Folate nl, Coombs 4+IgG
– Well!
• Given 12 mo prednisone without effect ---
• Retic #20 (0.5%)
• BM with MDS, evolving AML– PNH
Microangiopathic Hemolysis
• DIC• TTP, HUS• Malignant Hypertension• Mechanical
– Vasculitis– Tumor– Cardiac Valve– SBE– TIPSS– AVM
Microangiopathic Hemolysis
MAHA-What Else Could It Be?
• MDS– Malignant– HIV
• B12
• Iron Deficiency
G6PD• X-linked, race variable• Unable to Reduce Glutathione
– Susceptible to oxidant damage• Drugs
– Sulfa– Methylene Blue– Anti-Malarial– Nitrates
• Infections• DKA• Fava Beans
G6PD DeficiencyA
vera
ge G
6PD
Act
.
Time in Circulation
“Italian” G6PD DeficiencyA
vera
ge G
6PD
Act
.
Time in Circulation
Normal
Nl mean
Severe G6PD Def.
“African” G6PD DeficiencyA
vera
ge G
6PD
Act
.
Time in Circulation
“African” G6PD DeficiencyA
vera
ge G
6PD
Act
.
Time in Circulation
G6PD in hemolysis
“African” G6PD Deficiencyhemolysing with oxidant stress
Ave
rage
G6P
D A
ct.
Time in Circulation
Hemolyzed
New Average G6PD Activity
Young Retics with more G6PD
Retic Hi Retic Low
Anemia
Destruction Loss MCV HiMCV NlMCV Lo
B12FolateToxic AZT,DDC Chemo DilantinMDSHepaticETOHThyroidOther
Nuclear Maturation
Lipid Bilayer
Diagnostic Tests-Low Retic Macrocytic
• Repeat Retic• Smear (round vs. oval macrocytes, hypersegmented
PMN)• B12 and Folate (and Iron)• Hepatic• Toxic?
– AZT, DDC, Stavudine, Lamivudine
– Chemo, ETOH
• Cold Agglutinin• To BM or not to BM
B12 Hyperseg PMN
B12 Deficiency
• ??Diagnostic level (<300)– Role of Methylmalonic acid
• ??atrophic gastritis• Role of Schilling Test today• Anti-Intrinsic Factor Ab (specific and
sensitive for Pernicious Anemia) • Diagnostic/therapeutic trial• ??Multi-factorial etiology of B12 & Anemia
Retic Hi Retic Low
Anemia
Destruction Loss MCV HiMCV NlMCV Lo
Iron(Lead)ThalassemiaFragmentationSideroblastic Anemia
acquiredcongenital
An Approach to Anemia
Diagnostic TestsLow Retic Microcytic
• Iron/TIBC vs. Ferritin• Hemoglobin Electropheresis
– Test Fe First• May mask B-Thal
– GENETIC SCREENING OF FAMILY– The “Normal” Electropheresis
• Nl Fe, Nl HPLC = Alpha Thal!
• Smear?• Value of MCV, RBC # and RDW• Lead?
Evaluating Iron
• Ferritin– Sensitive/specific
• Except increased in inflammation, liver disease, malignancy• Fe/TIBC (Transferrin) and Saturation
– Decreased in inflammation, malignancy– < 10% Sat suggests Iron Deficiency
• THEREFORE:– Iron Trial almost always safe– Serum (soluble) Transferrin Receptor
• Mediates iron transfer into cell• Increased in Fe-def, rapid cell production
– CHR-Retic Hemoglobin Concentration?• Follow-up GI Eval
– 10 -15% with malignancy– ?Only if ferritin <100?
Iron Metabolism
PlasmaFe-Tf
Hepcidin
Hepcidin
Hepcidin
Iron Signal?
Erythropoiesis Signalanemia, hypoxia
RBC
Bone MarrowDuodenum
Spleen
Tomas Ganz ASH 2006
InflammationIL-6
Hep
cidin
Dec. Hep
Inc. Hep
Treatment of Iron Deficiency
• Oral always preferred– ?low dose equally effective– ?role for Vitamin C
• When to use IV iron– Recent decreased risk of anaphylaxis– Poor compliance
• Side-effects, etc
– Poor Absorption• Jejeunal/duodenal disease• Sprue• “Chronic Disease”?• Anemia of Malignancy
Retic Hi Retic Low
Anemia
Destruction Loss MCV HiMCV NlMCV Lo
Early AnythingMild/Treated Transfused Chronic DiseaseRenalMixedEndocrineIntrinsic BM Aplastic Myeloma True Lymphoma Drug Infection Anorexia Malignancy Parvovirus
Myelosuppressive Drugs in HIV
• ACV, Ganciclovir, Foscarnet, Cidofovir
• Ampho
• Septra/Dapsone/ IV Pentamidine
• Pyrimethamine
• AZT, Zalcitabine
• Chemo
• Interferon
Intrinsic Marrow Involvement
• Infections– Fungal– AFB
• MAC and TB– Parvovirus
• Malignancy– DLCL– Hodgkins– Myeloma– Other (Castlemans, Hemophagocytosis, etc)
• Dysplasia
Parvovirus Infection
• Persistent/Relapsing anemia in immunocompromised– Neutropenia in 35%, Thrombocytopenia 20%
• Treatable with IVIG (repeated courses??)
• Diagnosis– Serology + 30%– PCR usually + (may be false “persistent” +)– Bone Marrow Bx Diagnostic (Cyto + Immuno)
Arch Path Lab Med. 2007 Nov;131(11):1697-9Morelli, P. Eur J Clin Mic Inf Dis 26:833, 2007
Bone Marrow Asp w/ Parvovirus
Parvovirus
Hgb and Quality of LifeQ
uali
ty o
f L
ife
(LA
SA
)
7 9 11 13Hgb
Crawford. Cancer 2002;95:888, Soignet. Semin Hematol. 2000
Risks of PRBC Tx vs. EPO
Erythropoietin RBC Transfusion