Complement C3, decreased
More common causes
Burn injury
Less common causes
Henoch-Schönlein purpura
Disseminated intravascular coagulation
Membranoproliferative glomerulonephritis
Systemic lupus erythematosus
Infective endocarditis
Hepatitis C virus infection
Chronic lymphocytic leukemia
Protein-losing enteropathy
Cryoglobulinemia
Invasive meningococcal disease
Lupus nephritis
Partial lipodystrophy
Atypical hemolytic uremic syndrome
Complement factor H deficiency
Post-streptococcal glomerulonephritis
Anti-glomerular basement membrane disease
Uncommon causes
Hereditary C3 deficiency