A 40-year-old male presents with excruciating unilateral flank pain radiating to the groin, accompanied by microscopic hematuria. Non-contrast spiral CT of the abdomen confirms a 4 mm stone in the distal ureter without hydronephrosis or infection. What is the most appropriate initial management?

Answer and explanation

Correct answer: A. Conservative expulsive therapy with hydration, analgesia, and an alpha-blocker such as tamsulosin

  1. Step 1: Assess stone dimensions and anatomy: Stones in diameter have an 80-90% probability of spontaneous passage.
  2. Step 2: Evaluate complications: No high-grade obstruction, fever, intractable pain, or renal failure is present.
  3. Step 3: Select first-line strategy: Medical expulsive therapy with oral hydration, NSAIDs for pain control, and an alpha-1 blocker (tamsulosin) facilitates passage.
Answer
Conservative expulsive therapy with hydration, analgesia, and an alpha-blocker such as tamsulosin.
Why not the others: 'Immediate ureteroscopy for every stone' over-treats a 4 mm distal stone that usually passes; 'immediate ESWL' and 'nephrostomy' are reserved for larger or infected, obstructed stones.

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