Laboratory tests (Table 1) revealed low peripheral white blood cell count 0.26 × 109/L (normal reference values: 4–10 × 109/L) with neutropenia (neutrophils, 0.05 × 109/L; normal reference values: 1.8–6.3 × 109/L ), eosinophils 0.01 × 109/L (normal reference values: 0.02–0.52 × 109/L), lymphocytes 0.16 × 109/L (normal reference values: 1.1–3.2 × 109/L), monocytes 0.04 × 109/L (normal reference values: 0.1–0.6 × 109/L), and elevations in C-reactive protein (CRP, 86 mg/dL; normal reference value: <8.0 ) and procalcitonin (49.04 ng/mL; normal reference value: <2.0). The gene discussed is CRP; the disease is neutropenia.