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Difficulty: MediumRheumatology and Immunology

A 65-year-old man comes to the office due to sudden, severe pain and swelling in his right big toe that began early this morning. He reports that the pain is so intense he cannot tolerate a bedsheet touching the foot. His medical history includes hypertension, diet-controlled type 2 diabetes mellitus, and stage 4 chronic kidney disease with a baseline serum creatinine of 2.8 mg/dL. His medications include amlodipine and bumetanide. Vital signs are within normal limits. Examination of the right foot shows a swollen, warm, dusky red, and exquisitely tender first metatarsophalangeal joint. Arthrocentesis yields cloudy yellow synovial fluid. Analysis of the fluid demonstrates a leukocyte count of 35,000/mm³ with 85% neutrophils. Polarized light microscopy reveals numerous needle-shaped crystals with strong negative birefringence. Which of the following is the most appropriate treatment for this patient's current condition?

  1. Intra-articular triamcinoloneAnswer
  2. B
    Oral indomethacin
  3. C
    Oral colchicine
  4. D
    Oral allopurinol
  5. E
    Intravenous vancomycin

Answer

Intra-articular triamcinolone
The correct answer provides localized, potent anti-inflammatory action without systemic toxicity. This patient is experiencing an acute gout flare, confirmed by the presence of needle-shaped, negatively birefringent crystals (monosodium urate) in the synovial fluid. The standard first-line therapies for acute gout include NSAIDs, colchicine, and systemic or intra-articular glucocorticoids. However, this patient has stage 4 chronic kidney disease. NSAIDs are strongly contraindicated as they can cause acute kidney injury. Colchicine requires extreme caution and dose adjustment in severe renal impairment, making it a less favorable choice. Systemic glucocorticoids could be used but may worsen glycemic control in his diabetes. An intra-articular injection of a glucocorticoid (such as triamcinolone) is highly effective for monoarticular flares and provides excellent localized relief while minimizing systemic absorption and renal risks.

Step-by-Step Solution

1
Diagnose the underlying condition based on clinical and laboratory findings.
The patient has an acute gout flare, evidenced by podagra (first metatarsophalangeal joint involvement) and synovial fluid showing negatively birefringent needle-shaped crystals.
Accurate diagnosis is required before initiating targeted therapy.
2
Evaluate the patient's comorbidities that affect pharmacologic management.
The patient has stage 4 chronic kidney disease (creatinine 2.8 mg/dL) and diabetes mellitus.
Comorbidities heavily dictate the safety profile of acute gout therapies.
3
Select the most appropriate treatment option avoiding contraindicated medications.
Intra-articular glucocorticoids (like triamcinolone) are chosen because NSAIDs and colchicine are contraindicated or highly risky in advanced renal failure.
Localized therapy resolves the acute inflammation effectively without exacerbating underlying renal dysfunction or causing systemic metabolic derangements.

Key Concept

Management of acute gout flares in patients with severe renal impairment requires avoiding NSAIDs and colchicine; intra-articular or systemic glucocorticoids are the preferred therapies.
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Topics

Rheumatology and Immunology

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