Table 1:

Summary of laboratory results at presentation of a 60-year-old woman with sudden onset of visual loss

InvestigationReference rangeResult
Leukocyte count, × 109/L4.0–11.05.39
Hemoglobin, g/L120–16099
Mean corpuscular volume, fL80–10083.1
Platelet count, × 109/L150–400262
Absolute neutrophil count, × 109/L (neutrophil %)1.8–7.7 (40%–70%)4.44 (82.3%)
Absolute lymphocyte count, × 109/L (lymphocyte %)1.0–4.0 (22%–44%)0.44 (8.2%)
Total protein, g/L60–8474
Albumin, g/L35–5032
Prothrombin time, s9–1311.4
Activated plasma thromboplastin time, s23.0–32.429.8
Urinalysis (protein)NegativeTrace
Gamma globulin, g/dL0.60–1.351.67
Antinuclear antibody (enzyme< 1.520.4
immunoassay), OD ratio
Antinuclear antibody (immunofluorescence assay)Negative> 1:640 (homogeneous)
Extractable nuclear antigens panelNegativePositive for SS-A antibodies
Anticardiolipin antibodies (IgG, IgM, IgA)< 9< 9
Lupus anticoagulantNegativeNegative
Erythrocyte sedimentation rate, mm/h0–30122
C-reactive protein, mg/L0–2079
  • Note: IgA = immunoglobulin A, IgG = immunoglobulin G, IgM = immunoglobulin M, OD = optical density.