On admission, laboratory analysis revealed anemia, renal dysfunction (eGFR 30 mL/min/1.73 m<sup>2</sup>), polyclonal gammopathy (IgG 7130 mg/dL), elevated serum IgG4 level (2130 mg/dL), and increased C-reactive protein (8.0 mg/dL). Here, CRP is linked to Abnormal renal physiology.