CRP and Decreased total leukocyte count: At onset, laboratory features showed leukopenia (2.38 × 103/uL), lymphopenia (0.89 × 103/uL), hypergammaglobulinemia (22.31 g/l) and normal C-reactive protein (CRP) (< 0.5 mg/dl); antinuclear antibody (ANA) and anti-dsDNA were negative.