What is poststreptococcal acute glomerulonephritis (AGN)?
Answer: Immunologic disease caused by deposited antigen-antibody complexes onto the glomerular basement membrane leading to glomerular destruction. Clinically it presents 2 to 3 weeks after S. pyogenes cellulitis or pharyngitis with hypertension, edema, and urine with RBC casts, oliguria, and azotemia.