Blood tests revealed anemia (hemoglobin 7.6 g/dL) and an increase in platelet count (58.6·104/μL), along with elevated markers of inflammation (ESR 1 h > 140 mm, CRP 211 mg/L, 50% hemolytic complement activity (CH50) 63 U/mL, complement component 3 (C3) 156 mg/dL, complement component 4 (C4) 37 mg/dL), and mild liver damage (Alanine transaminase (ALT) 40 U/L). Here, C3 is linked to anemia (phenotype).