differentiating warm vs. drug-induced aiha handouts june ...€¦ · • aabb technical manual,...
TRANSCRIPT
![Page 1: Differentiating Warm vs. Drug-Induced AIHA Handouts June ...€¦ · • AABB Technical Manual, 17th ed., 2011 Drug-dependent antibodies reacting in the presence of drugpresence of](https://reader033.vdocument.in/reader033/viewer/2022060714/607b07ab669cc15cc458c70c/html5/thumbnails/1.jpg)
5/25/2012
1
Differentiating Warm vs. Drug-induced AIHA
South Central Association of Blood BanksPre-Meeting Symposium
Susan T. Johnson, MSTM, MT(ASCP)SBBBloodCenter of Wisconsin
Milwaukee, WI
June 6, 2012
Objectives• Describe the initial serologic results
observed in a patient with warm autoimmune hemolytic anemia and drug-induced immune hemolytic anemia
• Explain the serologic test results that differentiate WAIHA from DIIHA
• List drugs most commonly associated today with drug-induced immune hemolytic anemia.
SERUM/PLASMA COLOR
• Typical WAIHA Sample• Usually “normal” color
• Yellow/Straw etc…Yellow/Straw etc…
![Page 2: Differentiating Warm vs. Drug-Induced AIHA Handouts June ...€¦ · • AABB Technical Manual, 17th ed., 2011 Drug-dependent antibodies reacting in the presence of drugpresence of](https://reader033.vdocument.in/reader033/viewer/2022060714/607b07ab669cc15cc458c70c/html5/thumbnails/2.jpg)
5/25/2012
2
Typical DIIHA Sample Serum/Plasma
Coke Colored?
INITIAL SEROLOGIC RESULTS
• Direct Antiglobulin Test• EluateEluate• Serum/Plasma Reactivity
![Page 3: Differentiating Warm vs. Drug-Induced AIHA Handouts June ...€¦ · • AABB Technical Manual, 17th ed., 2011 Drug-dependent antibodies reacting in the presence of drugpresence of](https://reader033.vdocument.in/reader033/viewer/2022060714/607b07ab669cc15cc458c70c/html5/thumbnails/3.jpg)
5/25/2012
3
DIRECT ANTIGLOBULIN TEST
J. O’Connor
WAIHADAT RESULTS
Polyspecific AHG 3 - 4+Anti-IgG 3 - 4+Anti-C3 0 - 3+Anti-C3 0 - 3+Control 0
WARM AUTOANTIBODY IN PLASMA
. . . ..
.. . . . . ... .
.
.
.. . . ...
.. .
![Page 4: Differentiating Warm vs. Drug-Induced AIHA Handouts June ...€¦ · • AABB Technical Manual, 17th ed., 2011 Drug-dependent antibodies reacting in the presence of drugpresence of](https://reader033.vdocument.in/reader033/viewer/2022060714/607b07ab669cc15cc458c70c/html5/thumbnails/4.jpg)
5/25/2012
4
WARM AUTOANTIBODY COATING RBCs
. . . ..
.. . . . . ... ...
.
.
.. . . . ..
.. ... .
WARM AUTOANTIBODY IN PLASMA (1+)
. . . ..
.. . . . . ... .
.
.
.. . . ...
.. .
WARM AUTOANTIBODY IN PLASMA (3+)
. . . ..
.. . . . . ... .
.
.
.. . . ...
.. .
![Page 5: Differentiating Warm vs. Drug-Induced AIHA Handouts June ...€¦ · • AABB Technical Manual, 17th ed., 2011 Drug-dependent antibodies reacting in the presence of drugpresence of](https://reader033.vdocument.in/reader033/viewer/2022060714/607b07ab669cc15cc458c70c/html5/thumbnails/5.jpg)
5/25/2012
5
WARM AUTOANTIBODY IN PLASMA (4+)
. . . ..
.. . . . . ... .
.
.
.. . . ...
.. .
DIIHADAT Results
• Reactivity depends on time of testing compared to presentation
P l ifi AHG 3 4Polyspecific AHG 3-4+Anti-IgG 3-4+Anti-C3 3-4+Control 0
DAT RESULTS IN DIIHA
• AABB Technical Manual, 15th ed., 2005Drug-dependent antibodies detected by
the immune complex methodthe immune complex method…
“complement may be the only globulin easily detected on the red cells, but IgG may be present.”
![Page 6: Differentiating Warm vs. Drug-Induced AIHA Handouts June ...€¦ · • AABB Technical Manual, 17th ed., 2011 Drug-dependent antibodies reacting in the presence of drugpresence of](https://reader033.vdocument.in/reader033/viewer/2022060714/607b07ab669cc15cc458c70c/html5/thumbnails/6.jpg)
5/25/2012
6
DAT RESULTS IN DIIHA
• AABB Technical Manual, 17th ed., 2011Drug-dependent antibodies reacting in the
presence of drugpresence of drug
“complement may be the only protein easily detected on the red cells, but IgG may be present.”
DAT STRENGTH & SPECIFICITY
IgG + C3 IgG Only C3 Only4+ 19 5 13+ 15 4
Transfusion 2007;47:697-702
2+ 6 11+ 2 5<1+ 4 2 4Total Total 46 46 17 17 553 of 71 patients had negative DAT
Typical DAT Results - DIIHA
On Day 3 Day 7 Day 14
Drug is discontinued
Presentationy y y
DAT 4+ 3+ 2+ 1+
![Page 7: Differentiating Warm vs. Drug-Induced AIHA Handouts June ...€¦ · • AABB Technical Manual, 17th ed., 2011 Drug-dependent antibodies reacting in the presence of drugpresence of](https://reader033.vdocument.in/reader033/viewer/2022060714/607b07ab669cc15cc458c70c/html5/thumbnails/7.jpg)
5/25/2012
7
Typical DAT Results - WAIHA
On Presentation
Day 3 Day 7 Day 14
DAT 4+ 4+ 4+ 3+DAT 4+ 4+ 4+ 3+
ELUTION IN WAIHA
• On initial evaluation• Confirms autoantibody is coating RBCs• Rules-out or identifies presence ofRules out or identifies presence of
drug-dependent antibody
Performing an Acid Elution
J. O’Connor
![Page 8: Differentiating Warm vs. Drug-Induced AIHA Handouts June ...€¦ · • AABB Technical Manual, 17th ed., 2011 Drug-dependent antibodies reacting in the presence of drugpresence of](https://reader033.vdocument.in/reader033/viewer/2022060714/607b07ab669cc15cc458c70c/html5/thumbnails/8.jpg)
5/25/2012
8
ELUATED C c E e K Fya Fyb Jka Jkb S s IAT IAT
1 + + 0 0 + 0 + 0 0 + 0 + 3 0√
2 0 0 + 0 + + 0 + + + + + 3 0√
3 + 0 + + 0 0 0 + + 0 + 0 3 0√
4 + 0 + 0 + 0 0 + 0 + 0 + 3
5 0 + + 0 + 0 + + + 0 + 0 3
Last WashEluate
6 0 0 + 0 + + 0 + 0 + + + 3
7 0 0 + 0 + 0 + 0 0 + 0 + 3
8 0 0 + 0 + 0 0 + + 0 + 0 3
Auto NT
ELUATE RESULTS IN DIIHA
• Rapid Acid• Most are negative
F di ti t l k• Few are disproportionately weaker as compared to strength of DAT
ELUATED C c E e K Fya Fyb Jka Jkb S s IAT IAT
1 + + 0 0 + 0 + 0 0 + 0 + 0√ 0√
2 0 0 + 0 + + 0 + + + + + 0√ 0√
3 + 0 + + 0 0 0 + + 0 + 0 0√ 0√
4 + 0 + 0 + 0 0 + 0 + 0 + 0√
5 0 + + 0 + 0 + + + 0 + 0 0√
Last WashEluate
6 0 0 + 0 + + 0 + 0 + + + 0√
7 0 0 + 0 + 0 + 0 0 + 0 + 0√
8 0 0 + 0 + 0 0 + + 0 + 0 0√
Auto NT
![Page 9: Differentiating Warm vs. Drug-Induced AIHA Handouts June ...€¦ · • AABB Technical Manual, 17th ed., 2011 Drug-dependent antibodies reacting in the presence of drugpresence of](https://reader033.vdocument.in/reader033/viewer/2022060714/607b07ab669cc15cc458c70c/html5/thumbnails/9.jpg)
5/25/2012
9
ELUATED C c E e K Fya Fyb Jka Jkb S s IAT IAT
1 + + 0 0 + 0 + 0 0 + 0 + w-2 0√
2 0 0 + 0 + + 0 + + + + + w-2 0√
3 + 0 + + 0 0 0 + + 0 + 0 w-2 0√
4 + 0 + 0 + 0 0 + 0 + 0 + w-2
5 0 + + 0 + 0 + + + 0 + 0 w-2
Last WashEluate
6 0 0 + 0 + + 0 + 0 + + + w-2
7 0 0 + 0 + 0 + 0 0 + 0 + w-2
8 0 0 + 0 + 0 0 + + 0 + 0 w-2
Auto NT
INITIAL ELUATE REACTIVITY
Negative 49<2+ 13
Transfusion 2007;47:697-702
4+ 2Not Tested 3
WAIHA vs. DIIHA
• Eluate• WAA strongly positive• DDA is negative or weakg
![Page 10: Differentiating Warm vs. Drug-Induced AIHA Handouts June ...€¦ · • AABB Technical Manual, 17th ed., 2011 Drug-dependent antibodies reacting in the presence of drugpresence of](https://reader033.vdocument.in/reader033/viewer/2022060714/607b07ab669cc15cc458c70c/html5/thumbnails/10.jpg)
5/25/2012
10
ANTIBODY DETECTION TEST IN WAIHATest Tube - Saline
IS 37C IATI 0 0 0 4+I 0 0 0-4+II 0 0 0-4+
ANTIBODY DETECTION TEST IN WAIHATest Tube - LISS
IS 37C IATI 0 0 0-4+II 0 0 0-4+
ANTIBODY DETECTION TEST IN WAIHATest Tube - PEG
IS 37C IATI 0 NH w-4+II 0 NH w-4+
![Page 11: Differentiating Warm vs. Drug-Induced AIHA Handouts June ...€¦ · • AABB Technical Manual, 17th ed., 2011 Drug-dependent antibodies reacting in the presence of drugpresence of](https://reader033.vdocument.in/reader033/viewer/2022060714/607b07ab669cc15cc458c70c/html5/thumbnails/11.jpg)
5/25/2012
11
ANTIBODY DETECTION TEST IN WAIHAGel or Solid Phase
IATI w-4+II w-4+
Antibody Identification in WAIHA – Gel
D C c E e K Fya Fyb Jka Jkb S s IAT
1 + + 0 0 + 0 + 0 + 0 0 + 3
2 + + 0 0 + + 0 + + + + + 3
3 + 0 + + 0 0 0 + + 0 + + 3
4 + 0 + 0 + 0 0 + 0 + 0 + 3
5 0 + + 0 + 0 + + + 0 + 0 3
Gel
6 0 0 + 0 + + 0 + 0 + + + 3
7 0 0 + 0 + 0 + 0 0 + 0 + 3
8 0 0 + 0 + 0 0 + + 0 + 0 3
Auto 3-4
Antibody Identification in WAIHA – Solid Phase
D C c E e K Fya Fyb Jka Jkb S s IAT
1 + + 0 0 + 0 + 0 + 0 0 + 3
2 + + 0 0 + + 0 + + + + + 3
3 + 0 + + 0 0 0 + + 0 + + 3
4 + 0 + 0 + 0 0 + 0 + 0 + 3
SP
5 0 + + 0 + 0 + + + 0 + 0 3
6 0 0 + 0 + + 0 + 0 + + + 3
7 0 0 + 0 + 0 + 0 0 + 0 + 3
8 0 0 + 0 + 0 0 + + 0 + 0 3
Auto ND
![Page 12: Differentiating Warm vs. Drug-Induced AIHA Handouts June ...€¦ · • AABB Technical Manual, 17th ed., 2011 Drug-dependent antibodies reacting in the presence of drugpresence of](https://reader033.vdocument.in/reader033/viewer/2022060714/607b07ab669cc15cc458c70c/html5/thumbnails/12.jpg)
5/25/2012
12
SERUM REACTIVITY IN DIIHA• Reactivity depends on time of testing
compared to presentation • Saline IAT - some positive• PEG or Ficin IAT - many positivey p• Gel – many positive
• http://www.aabb.org/development/awardsscholarships/scholarships/Documents/10kirchner.pdf
• SPRCA – similar to saline IAT• I.S. – few positive
ANTIBODY DETECTION TEST IN DIIHATest Tube - Saline
IS 37C IATI 0 0 0 4+I 0 0 0-4+II 0 0 0-4+
SERUM REACTIVITY WITHOUT ADDITION OF DRUG
• Drug-Dependent Antibody • Drug remains in patient’s circulation• Drug is present in test method
• Trimethoprim & Sulfamethoxazole (gel test)
• Drug-Independent “Autoantibody”• Serum is reactive after drug has cleared
![Page 13: Differentiating Warm vs. Drug-Induced AIHA Handouts June ...€¦ · • AABB Technical Manual, 17th ed., 2011 Drug-dependent antibodies reacting in the presence of drugpresence of](https://reader033.vdocument.in/reader033/viewer/2022060714/607b07ab669cc15cc458c70c/html5/thumbnails/13.jpg)
5/25/2012
13
SERUM DIALYSIS
Drug
TESTING OF DIALYZED SERUM
IS 60’ 37C IAT
Pre-Dialysis Serum + RBCs 0 1 4
Di l d S RBC 0 0 0Dialyzed Serum + RBCs 0 0 0
Dialyzed Serum +RBCs + Drug 0 1 4
Typical IAT Results - DIIHA
On Day 3 Day 7 Day 14
Drug is discontinued
Presentationy y y
IAT 3+ 0 0 0
![Page 14: Differentiating Warm vs. Drug-Induced AIHA Handouts June ...€¦ · • AABB Technical Manual, 17th ed., 2011 Drug-dependent antibodies reacting in the presence of drugpresence of](https://reader033.vdocument.in/reader033/viewer/2022060714/607b07ab669cc15cc458c70c/html5/thumbnails/14.jpg)
5/25/2012
14
Typical IAT Results - WAIHA
On Presentation
Day 3 Day 7 Day 14
IAT 3+ 3+ 3+ 2+IAT 3+ 3+ 3+ 2+
PATIENT HISTORY
• Thorough investigation • Signs & symptoms of hemolysis• Medication/Drug History
DRUG HISTORY
• Prescription drugs• Over-The-Counter drugs
Alt ti (h b l) di ti• Alternative (herbal) medications
![Page 15: Differentiating Warm vs. Drug-Induced AIHA Handouts June ...€¦ · • AABB Technical Manual, 17th ed., 2011 Drug-dependent antibodies reacting in the presence of drugpresence of](https://reader033.vdocument.in/reader033/viewer/2022060714/607b07ab669cc15cc458c70c/html5/thumbnails/15.jpg)
5/25/2012
15
DRUG HISTORY
• Timing and dosage of medication
• History of surgical procedures requiring• History of surgical procedures requiring antibiotics
• History of pain requiring NSAIDS
“UNIFYING” THEORY(Habibi & Garratty)
HaptenHapten--dependent antibodydependent antibodyType IType I
*Drug*Drug--independent antibodyindependent antibodyType IIType II
*Drug*Drug--dependent dependent antibodyantibodyType IIIType III
Type I“Penicillin-Type”“Hapten-Type”
(Drug Adsorption)
• Drug binds covalently to membrane proteins and stimulates hapten-dependent antibodies
• Antibody reacts with normal RBCs pretreated with drug
![Page 16: Differentiating Warm vs. Drug-Induced AIHA Handouts June ...€¦ · • AABB Technical Manual, 17th ed., 2011 Drug-dependent antibodies reacting in the presence of drugpresence of](https://reader033.vdocument.in/reader033/viewer/2022060714/607b07ab669cc15cc458c70c/html5/thumbnails/16.jpg)
5/25/2012
16
Type I – Drug Treated RBCsHapten-Dependent Antibody
Type I – Drug Treated RBCsHapten-Dependent Antibody
HaptenHapten--dependent antibodydependent antibody
Drug-independent antibody Drug-dependent antibody
![Page 17: Differentiating Warm vs. Drug-Induced AIHA Handouts June ...€¦ · • AABB Technical Manual, 17th ed., 2011 Drug-dependent antibodies reacting in the presence of drugpresence of](https://reader033.vdocument.in/reader033/viewer/2022060714/607b07ab669cc15cc458c70c/html5/thumbnails/17.jpg)
5/25/2012
17
DDA REACTING WITH DRUG-TREATED RBCsCephalosporins 31
Cefotetan 26Cefuroxime 1Cefotaxime 1Cefoxitin 1Cefoxitin 1Ceftazidime 1Cefazolin 1
Penicillin/Penicillin Derivatives 7Piperacillin 5Ampicillin 1Nafcillin 1
Total 38
Cases/Fatalities of DIIHA over 10 years
Drug Number* PercentageCefotetan 36 (4) 43Ceftriaxone 17 (5) 21Piperacillin 14(1) 17β l t 6 7
G Garratty, Blood Reviews 24 (2010) 143–150
β-lactamaseinhibitors
6 7
Other Cephalosporins
11
Others 9# 11Total 83 (10) 100
* Columns contain number (fatalities) of cases associated with each drug.# Oxaliplatin (3), carboplatin (1), rifampin (1), diclofenac (1), cimetidine (1),sulfamethoxazole (1), and trimethoprime (1).
Type IIDrug-Independent Antibody
(Autoantibody)• Through an unknown mechanism, drug
induces autoantibodies specific for RBC duces au oa bod es spec c o Cmembrane proteins
• Antibody reacts with normal RBCs in the absence of drug
![Page 18: Differentiating Warm vs. Drug-Induced AIHA Handouts June ...€¦ · • AABB Technical Manual, 17th ed., 2011 Drug-dependent antibodies reacting in the presence of drugpresence of](https://reader033.vdocument.in/reader033/viewer/2022060714/607b07ab669cc15cc458c70c/html5/thumbnails/18.jpg)
5/25/2012
18
Hapten-dependent antibody
DD i d d t i d d t DrugDrug--independent independent antibodyantibody
Drug-dependent antibody
Type III“Nonpenicillin-Type”“Neoantigen Type” (“Immune Complex”)
• Through an unknown mechanism, d i d tib di th t bi d tdrug induces antibodies that bind to RBC only when drug is present in soluble form
• Antibody reacts with RBCs when soluble drug is present
Type III – I.P.O.D.Drug-Dependent Antibody
![Page 19: Differentiating Warm vs. Drug-Induced AIHA Handouts June ...€¦ · • AABB Technical Manual, 17th ed., 2011 Drug-dependent antibodies reacting in the presence of drugpresence of](https://reader033.vdocument.in/reader033/viewer/2022060714/607b07ab669cc15cc458c70c/html5/thumbnails/19.jpg)
5/25/2012
19
Type III – I.P.O.D.Drug-Dependent Antibody
Hapten-dependent antibody
Drug-independent antibodyDrugDrug--dependent dependent antibodyantibody
BCW EXPERIENCEDDA REACTING IN PRESENCE OF DRUG
Quinine/Quinidine 7
Others 15Ceftriaxone 5Ceftazidime 1Zosyn (piperacillin & tazobactum) 5Oxaliplatin 2Carboplatin 1Bactrim/Trimethoprim 1
![Page 20: Differentiating Warm vs. Drug-Induced AIHA Handouts June ...€¦ · • AABB Technical Manual, 17th ed., 2011 Drug-dependent antibodies reacting in the presence of drugpresence of](https://reader033.vdocument.in/reader033/viewer/2022060714/607b07ab669cc15cc458c70c/html5/thumbnails/20.jpg)
5/25/2012
20
BCW EXPERIENCEDDA REACTING IN PRESENCE OF DRUG
NSAIDs 11Tolmetin 3Sulindac 2Ibuprofen 1
Others 7Probenecid 1Levafloxacin 1M f i 1
pDiclofenac* 2Etodolac* 1Nabumetone* 1Indomethacin* 1
*Urine-metabolite dependent
Mefoxin 1Carboplatin 1Oxaliplatin 2Bactrim 1
NON-IMMUNOLOGIC ADSORPTION OF PROTEIN ONTO RBCs
• Cephalosporins• Cisplatin/Carboplatin/Oxaliplatin• Diglycoaldehyde (INOX)• Suramin• β-lactamase inhibitors
• Sulbactam (in Unasyn)• Clavulanate (in Augmentin and Timentin) • Tazobactam (in Zosyn/Tazocin)
Garratty
![Page 21: Differentiating Warm vs. Drug-Induced AIHA Handouts June ...€¦ · • AABB Technical Manual, 17th ed., 2011 Drug-dependent antibodies reacting in the presence of drugpresence of](https://reader033.vdocument.in/reader033/viewer/2022060714/607b07ab669cc15cc458c70c/html5/thumbnails/21.jpg)
5/25/2012
21
NON-IMMUNOLOGIC ADSORPTION OF PROTEIN ONTO RBCs
• Not thought to cause DIIHA when first described with cephalothin-treated RBCsRBCs.
• Since then, suggestions in the literature that certain drugs that cause nonspecific protein uptake (e.g., cisplatin, sulbactam, clavulanate) can cause HA
DRUG EVALUATION• Check for previous implications of causing
hemolysis• Physicians Desk Referencey• Drug Facts and Comparison• AABB Technical Manual• Judds Methods in Immunohematology• Published articles & abstracts
TESTING DRUG-TREATED RBCs
Patient Serum Pos Con Normal SerumNEAT 1:2 1:4 1:8 1:20 NEAT 1:2 1:4 1:8 1:20
15’RT 4 4 3 3 3 4 3 2 0 0 030 37C 4 4 3 2 1 4 0 0 0 0 030 37C 4 4 3 2 1 4 0 0 0 0 0IAT 4 4 4 4 4 4 0 0 0 0 0
15’RT 0
30 37C 0IAT 0
Unt
rtd
RB
Cs
![Page 22: Differentiating Warm vs. Drug-Induced AIHA Handouts June ...€¦ · • AABB Technical Manual, 17th ed., 2011 Drug-dependent antibodies reacting in the presence of drugpresence of](https://reader033.vdocument.in/reader033/viewer/2022060714/607b07ab669cc15cc458c70c/html5/thumbnails/22.jpg)
5/25/2012
22
TESTING IN PRESENCE OF DRUGe+ RBCs 30’RT 60’ 37C IAT
Patient Serum + Drug 2 3 4Patient Serum + Drug + C 2 3 4Patient Serum + Diluent 0 0 0P ti t S Dil t C 0 0 0Patient Serum + Diluent + C 0 0 0C + Drug 0 0 0C + Diluent 0 0 0Diluent + Drug 0 0 0Eluate + Drug 0 0 3Eluate + Diluent 0 0 0Positive Control + Drug 4 4 4
TESTING IN PRESENCE OF DRUG Autoantibody Present
Patient Serum (No Drug Added) Patient Serum + DrugNEAT 1:2 1:4 1:8 1:16 NEAT 1:2 1:4 1:8 1:16
30’ RT 0 0 0 0 0 3 2 1 0 030 RT 0 0 0 0 0 3 2 1 0 060’ 37C 0 0 0 0 0 4 3 2 1 0IAT 2 1 0 0 0 4 4 4 3 2
b l i b dwww.belearning.bcw.edu
![Page 23: Differentiating Warm vs. Drug-Induced AIHA Handouts June ...€¦ · • AABB Technical Manual, 17th ed., 2011 Drug-dependent antibodies reacting in the presence of drugpresence of](https://reader033.vdocument.in/reader033/viewer/2022060714/607b07ab669cc15cc458c70c/html5/thumbnails/23.jpg)
5/25/2012
23
TYPICAL INITIAL SEROLOGIC RESULTS
Polyspecific AHG 3 - 4+Anti-IgG 3 - 4+Anti-C3 0 - 3+Control 0
IS 37C IATI 0 0 0 - 4+II 0 0 0 - 4+
TYPICAL INITIAL SEROLOGIC RESULTS
Polyspecific AHG 3 - 4+Anti-IgG 0Anti-C3 3 – 4+Control 0
IS 37C IATI 2-4+ 0-2+ 0II 2-4+ 0-2+ 0
DIIHA vs AIHA• Eluate
• DDA is negative or weak• WAA strongly positiveWAA strongly positive
• Serum • DDA disappears within days if drug
is discontinued• WAA persists
![Page 24: Differentiating Warm vs. Drug-Induced AIHA Handouts June ...€¦ · • AABB Technical Manual, 17th ed., 2011 Drug-dependent antibodies reacting in the presence of drugpresence of](https://reader033.vdocument.in/reader033/viewer/2022060714/607b07ab669cc15cc458c70c/html5/thumbnails/24.jpg)
5/25/2012
24
Objectives• Describe the initial serologic results
observed in a patient with warm autoimmune hemolytic anemia and drug-induced immune hemolytic anemia
• Explain the serologic test results that differentiate WAIHA from DIIHA
• List drugs most commonly associated today with drug-induced immune hemolytic anemia.
Thank You