A 7-year-old boy has periorbital edema and cola-colored urine 2 weeks after a sore throat. Which finding is expected?
Answer and explanation
Correct answer: D. Low serum C3 with subepithelial humps
- Step 1: Post-streptococcal glomerulonephritis lowers C3 and shows subepithelial immune complexes. Answer: Low serum C3 with subepithelial humps. Why not the others: Linear IgG on the basement membrane, Mesangial IgA deposits and Foot process effacement only don't fit.
Practise more Pathology.
Free questions with an explanation for every one, and full timed USMLE Step 1 mock tests.
More Pathology questions
- A 40-year-old man with a long history of reflux has a distal esophagus lined with columnar epithelium and goblet cells. What is the complica…
- A 55-year-old woman has a mole that has changed in color and size. Biopsy shows atypical melanocytes invading the dermis. Which feature best…
- An 8-year-old boy has bowed legs, widened wrists and a rachitic rosary. Which vitamin deficiency is most likely?
- A 25-year-old man has painless cervical lymphadenopathy and Reed-Sternberg cells with owl-eye nuclei on biopsy. What is the diagnosis?
- A 60-year-old man has a swollen, red first metatarsophalangeal joint. Joint fluid shows negatively birefringent needle-shaped crystals. What…
- A 58-year-old man has crushing chest pain for 2 hours. ECG shows ST elevation in leads II, III and aVF. Which coronary artery is most likely…