Blood test results on the day of admission revealed an elevated white blood cell (WBC) count (14,600/μL), mild anemia (hemoglobin level, 11.1 g/dL), thrombocytopenia (platelet count, 11.1 × 104/μL), renal impairment (blood urea nitrogen level, 60.7 mg/dL and serum creatinine level, 2.94 mg/dL), an elevated C-reactive protein (CRP) level (14.25 mg/dL), an elevated ALP level (768 U/L), polyclonal hypergammaglobulinemia (immunoglobulin G [IgG], 2461 mg/dL), and an elevated IgG4 level (235 mg/dL). Here, CRP is linked to Thrombocytopenia.