A 28-year-old woman has fever, loin pain and dysuria with pyuria. What is the most likely diagnosis?

Answer and explanation

Correct answer: A. Acute pyelonephritis

  1. Step 1: The picture of fever with loin pain and dysuria fits Acute pyelonephritis.
Answer
Acute pyelonephritis.
Why not the others: 'Renal colic': it causes colicky pain with haematuria and no fever. 'Acute cystitis': it gives dysuria and frequency without fever or loin pain. 'Acute appendicitis': it gives migrating right iliac fossa pain.

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