A 10-year-old boy presents to the clinic with facial puffiness, dark-colored urine, and decreased urine output for the past 3 days. His mother reports he had a "strep throat" infection approximately two weeks ago that was not treated with antibiotics. Urinalysis shows red blood cell casts, proteinuria, and hematuria. His blood pressure is 145/95 mmHg. Which of the following is the most likely diagnosis?
✓ Correct Answer: Option C
The classic presentation of PSGN includes periorbital edema, dark urine, hypertension, and evidence of prior streptococcal infection (pharyngitis or impetigo), typically 1-3 weeks prior. Urinalysis findings are consistent with glomerulonephritis.