Laboratory tests demonstrated abnormal serum electrolytes (sodium 132 mmol/L, potassium 3.2 mmol/L), acute renal insufficiency (serum creatinine 2.6 mg/dL [229.8 μmol/L], blood urea nitrogen 37 mg/dL [6.2 mmol/L]), mild anemia (hemoglobin, 13.2 g/dL [8.20 mmol/L]), metabolic acidosis (pH 7.353, HCO3 17.6 mmol/L, lactate 3.9 mmol/L), and elevated C-reactive protein (CRP, 29.5 mg/dL [2809.5 mmol/L]). Here, CRP is linked to anemia.