Comparison of Laboratory Results Among Hemoglobin S Disorders

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The page below is a sample from the LabCE course Hemoglobinopathies: Hemoglobin S Disorders. Access the complete course and earn ASCLS P.A.C.E.-approved continuing education credits by subscribing online.

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Comparison of Laboratory Results Among Hemoglobin S Disorders

Typical CBC results and hemoglobin detection results include:

CharacteristicSickle Cell Disease (HbSS)Sickle Cell Trait (HbSA)HbS-Beta ThalassemiaHemoglobin SC
Anemia Severe
Normocytic,Normochromic
None to mild
Normocytic, Normochromic
Mild to severe
Microcytic, Hypochromic
Mild to moderate
Normocytic, Normochromic
Hemoglobin5-9 g/dL11-15 g/dL 5-10 g/dL 11-13 g/dL
MCVNormal NormalDecreasedNormal
MCHCIncreasedNormal Decreased Increased to Normal
RDWIncreasedIncreasedIncreasedIncreased
RBC Morphology
  • Codocytes
  • Drepanocytes
  • Basophilic Stippling
  • Polychromasia
  • nRBC's
  • Howell-Jolly bodies
  • Pappenheimer bodies (non-functioning spleen)
  • Usually normal
  • Codocytes may be present
  • Drepanocytes rarely seen
  • Codocytes
  • Drepanocytes
  • Basophilic Stippling
  • Codoctyes
  • HbSC crystals
  • Xerocytes
Reticulocytes Increased, unless in aplastic crisis Usually normal Normal to decreased OR
increased depending on type of beta-thalassemia
Slightly increased
WBC's and Platelets Neutrophilic leukocytosis and thrombocytosis Usually normalUsually normalUsually normal
Solubility TestPositive Positive PositivePositive
Hemoglobin electrophoresis
  • HbS 80-95%
  • HbA 0%
  • HbA2 2-3.5%
  • HbF 0.5-10%
  • HbS 20-40%
  • HbA 60-80%
  • HbA2 2-3.5%
  • HbF <2%
HbSβ+
  • HbS 55-75%
  • HbA 5-30%
  • HbA2 <3.5%
  • HbF 5-20%
HbSβ0
  • HbS 80-95%
  • HbA 0%
  • HbA2 <3.5%
  • HbF 5-20%
  • HbS 45-50%
  • HbC 45-50%
  • HbF 0-7%