6/30/23, 10:04 PM Complement C4, decreased Pathway Feedback Search Clinical Topics Home Findings Complement C4, decreased Complement C4, decreased More common causes Malnutrition Less common causes Rheumatoid arthritis Protein losing enteropathy C1 esterase inhibitor deficiency Systemic lupus erythematosus Glomerulonephritis Uncommon causes Hereditary C4 deficiency https://web.pathway.md/findings/rec0JHXR1sJxpV75E 1/1