A 10-year-old boy presents with tea-colored urine, facial swelling, and fatigue two weeks after a sore throat.
Physical examination reveals periorbital edema and hypertension. Laboratory studies show:
• Urine dipstick: Positive for blood and protein
• Serum C3: Low
• Serum C4: Normal
What is the most likely diagnosis?
A 40-year-old man presents with fatigue, hemoptysis, and dark-colored urine. Physical examination reveals mild edema, and laboratory results show:
• Hemoglobin: 9.5 g/dL (low)
• Serum creatinine: 3.2 mg/dL (elevated from a previous baseline of 0.8 mg/dL)
• Urinalysis: Dysmorphic RBCs and RBC casts
• Chest X-ray: Bilateral pulmonary infiltrates
Which of the following is the most likely diagnosis?
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