A 30-year-old woman has fever, dysuria and flank pain with costovertebral angle tenderness. What is the diagnosis?

Answer and explanation

Correct answer: D. Acute pyelonephritis

  1. Step 1: Fever with flank pain and tenderness indicates upper urinary tract infection. Answer: Acute pyelonephritis. Why not the others: Acute cystitis, Renal colic and Perinephric abscess don't fit.

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