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Updated: Jan 26 2017

Anemia of Chronic Disease

Snapshot
  • A 56-year-old man presents to his annual physical exam with weight loss, fatigue, and weakness. He is a long-term smoker and also recently immigrated from Southeast Asia. He complains of a chronic cough for the past year with occasional bloody mucus. He agrees to undergo imaging for lung lesions and a blood test for tuberculosis. Iron studies reveal decreased serum iron, increased ferritin, and decreased TIBC. Peripheral blood smear shows basophilic stippling.
Introduction

 
  • Anemia of chronic disease resulting from decreased red blood cell production is a 
    • normochromic, normocytic anemia
  • Pathogenesis
    • iron is stored in macrophages or bound with ferritin
    • hepcidin is an acute-phase reactant that is increased in states of inflammation
      • inflammation causes release of hepcidin by the liver
      • ↑ hepcidin inhibits iron absorption from diet and prevents release of iron bound by ferritin from macrophages
  • Associated conditions
    • chronic inflammatory condition
    • chronic infection
      • tuberculosis
    • longstanding malignancy
  • Prognosis
    • varied based on underlying inflammatory condition
Presentation
  • Symptoms of anemia
    • generalized weakness
    • fatigue
    • shortness of breath
    • headache
  • Physical exam
    • pallor
    • tachycardia
Evaluation
  • Labs
    • ↑ ferritin
    • ↓ serum iron
    • ↓ TIBC, transferrin saturation, and MCV
  • Peripheral blood smears
    • normochromic RBCs
    • may be normocytic or microcytic
    • basophilic stippling
      • can be seen in alcohol abuse, lead poisoning, thalassemias, and hereditary pyrimidine 5'-nucleotidase deficiency
Differential Diagnosis
  • Anemia of renal disease
  • Iron deficiency anemia
  • Aplastic anemia
Treatment
  • Treat underlying disease
  • If underlying disease is unknown or treatment of underlying disease does not improve symptomatic anemia
    • measure EPO
      • if low, administer EPO or erythropoiesis-stimulating agents (ESAs)
        • make sure iron stores are sufficient
        • if insufficient, patients may be resistant to EPO
      • if normal, give packed RBCs
Complications
  • Severe anemia
Question
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