Table 1

List of laboratory data and imaging

CBC	↓Haemoglobin, 6.7 g/dL (normal range, 13–17 g/dL) Normal MCV, 91.0 fL (normal range, 83–100 fL) ↑ RDW, 18.3% (normal range, 11%–14%) ↓ Platelet, 6×10³/µL (normal range, 150–410×10³/µL) ↑ WBC, 14 600×10³/µL (normal range, 4.5–11×10³/µL)
Haemolysis workup	↑ Total bilirubin, 48.0 µmol/L (normal range, 0–20 µmol/L) ↑ Indirect bilirubin, 26.6 µmol/L (normal range, 0–8.6 µmol/L) ↑ LDH, 1600 U/L (normal range, 125–220 U/L) ↓ Haptoglobin, 0.2 g/L (normal range, 0.3–2.0 g/L) ↑ Reticulocyte count, 34.4% (normal range, 0.3%–1.5%) Negative direct Coombs test
Renal function and urinalysis	Normal BUN, 6.7 mmol/L (normal range, 2.5–7.5 mmol/L) Normal creatinine, 77 µmol/L (normal range, 50–110 µmol/L) Normal urinalysis
Serology	↑ CRP, 7.68 mg/L (normal range, 0.0009–3.3 mg/L) ESR, 2 mm/1st hour (normal range, 0–10 mm/1st hour) Negative ANA and anti-dsDNA Negative anticardiolipin, β−2 glycoprotein I antibody and lupus anticoagulant Negative ANCA screening Negative anti-Smith Normal C3 and C4 Negative rheumatoid factor and anti-CCP Negative thyroglobulin antibody
ADAMTS 13	Not available
Coagulation	Normal PT, INR, PTT and fibrinogen level ↑ D-dimer, 7.29 µg/mL (normal range, <0.5 µg/mL)
Infection workup	↑ Ferritin, 1556 ng/mL (normal range, 18–270 ng/mL) Negative blood culture, urine culture, anti-HIV, anti-HBV and anti-HCV
Malignancy workup	Normal range of B-HCG, CEA, CA 19-9 and tPSA
Imaging	Chest X-ray: normal (figure 6) CT of the chest, abdomen and pelvis: thickening of the abdominal aorta and iliac arteries, which is concerning of vasculitis or atherosclerosis. For chest, normal lungs and no PE (figure 7) CT of the brain: normal study and no evidence of bleeding or ischaemia (figure 3)

ANA, antinuclear antibodies; ANCA, antineutrophil cytoplasmic antibodies; B-HCG, beta human chorionic gonadotropin; BUN, blood urea nitrogen; CA 19-9, cancer antigen 19-9; CBC, complete blood count; CCP, cyclic citrullinated peptide; CEA, carcinoembryonic antigen; CRP, C reactive protein; dsDNA, double-stranded DNA; ESR, erythrocyte sedimentation rate; HBV, hepatitis B virus; HCV, hepatitis C virus; INR, international normalised ratio; LDH, lactate dehydrogenase; MCV, mean corpuscular volume; PE, pulmonary embolism; PT, prothrombin time; PTT, partial thromboplastin time; RDW, red cell distribution width; tPSA, total prostate-specific antigen; WBC, white blood cell.