Hemolytic anemia differential diagnosis
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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1] Shyam Patel [2]
Overview
Differentiating Hemolytic anemia from other Diseases
Characteristic/Parameter | Hemolytic anemia | Sideroblastic anemia | Anemia of chronic disease | Thalassemia | Iron-deficiency anemia | Erythropoietin deficiency | Vitamin B12 deficiency | Folate deficiency |
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Etiology | Drug-induced, immune-mediated, non-immune-mediated, infections, rheumatologic disease | Bleeding, thrombosis, petechiae, sepsis | Renal failure, hematuria, bleeding, microangiopathic hemolytic anemia | Renal failure, hematuria, bleeding, microangiopathic hemolytic anemia | Petechiae, bleeding, other autoimmune diseases | Petechiae, purpura, ecchymoses | Bleeding, photosensitivity, arthritis, malar rash, discoid rash, renal failure, seizures, psychosis | Bleeding, photosensitivity, arthritis, malar rash, discoid rash, renal failure, seizures, psychosis |
Mean corpuscular volume | Normocytic (80-100 femtoliter) | Low | Low | Low | Low; can be as low as 10000 per microliter | Low; can be less than 10000 per microliter; sudden onset after transfusion | Variable; usually low | Bleeding, photosensitivity, arthritis, malar rash, discoid rash, renal failure, seizures, psychosis |
Laboratory abnormalities | Indirect hyperbilirubinemia, reticulocytosis, low haptoglobin, elevated LDH | Elevated | Normal | Normal | Normal | Normal | Usually normal | Bleeding, photosensitivity, arthritis, malar rash, discoid rash, renal failure, seizures, psychosis |
Physical exam | Pallor, jaundice | Sepsis, delivery of fetus, acute promyelocytic leukemia, other malignancy | E.coli strain O157:H7; Shiga-like toxin | Dysregulation of complement activation; mutation in complement factor H | Idiopathic; can be secondary to chronic lymphocytic leukemia, HIV, viral hepatitis, H. pylori | Exposure to transfused products | Autoimmunity with development of antibodies to DNA | Bleeding, photosensitivity, arthritis, malar rash, discoid rash, renal failure, seizures, psychosis |
Treatment | Removal of offending agent, steroids, alternative immunosuppression | Possible | No | No | Yes | No; transfusion-related | Possible; drug-induced lupus can be caused by medications like hydralazine or isoniazid | Bleeding, photosensitivity, arthritis, malar rash, discoid rash, renal failure, seizures, psychosis |
Other associated abnormalities | Possible | Usually | Usually | Usually | Yes; spontaneous bleeding if platelet count < 10000 per microliter | Yes; spontaneous bleeding if platelet count < 10000 per microliter | Rare | Bleeding, photosensitivity, arthritis, malar rash, discoid rash, renal failure, seizures, psychosis |