Table 1 Initial investigations

White blood cell count (WBC)

11.4 × 10⁹/L (neutrophils 51%, lymphocytes 31%)

Hemoglobin (Hb)

13.1 g/dL

Mean corpuscular volume (MCV)

83.9 fL

Platelets (PLT)

397 × 10⁹/L

Aspartate aminotransferase (AST)

31.5 U/L

Alanine aminotransferase (ALT)

30.8 U/L

Serum creatine (SCr)

75 μmol/L

Blood urea (BU)

3.2 mmol/L

Serum albumin (Alb)

40.1 g/dL

Serum sodium (Na)

140 mmol/L

Serum potassium (K)

4.46 mmol/L

Creatine phosphokinase (CPK)

47 μg/L (normal range 24–190 μg/L)

Creatine kinase myocardial band (CK-MB)

19 IU/L (normal range 1.8–24 IU/L)

Erythrocyte sedimentation rate (ESR)

125 mm per hour

C-reactive protein (CRP)

42 mg/L

Rheumatoid factor (RhF)

202 U/ml

Anti-cyclic citrullinated peptide antibody level (anti-CCP)

717 U/ml (< 25 U/ml)

Thyroid-stimulating hormone (TSH)

3.611 μIU/ml