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Difficulty: MediumRheumatology and Immunology

A 65-year-old man is evaluated on postoperative day 3 following an uncomplicated laparoscopic hemicolectomy for diverticular disease. He reports the sudden onset of severe right knee pain and swelling that began overnight. He is unable to bear weight on the right leg. His medical history is significant for hypertension, type 2 diabetes mellitus, and chronic kidney disease stage 4. Current medications include amlodipine, lisinopril, furosemide, and subcutaneous enoxaparin. Temperature is 38.0°C (100.4°F), blood pressure is 148/92 mmHg, pulse is 92/min, and respirations are 16/min. Physical examination reveals a warm, erythematous, and swollen right knee with a significant effusion. Passive range of motion is markedly decreased due to pain. Examination of the calves reveals no cords or localized tenderness. Laboratory studies show a serum creatinine of 2.6 mg/dL (baseline 2.5 mg/dL). Arthrocentesis of the right knee yields cloudy yellow fluid. Synovial fluid analysis reveals:

ParameterResult
Leukocyte count42,000/mm³ (88% neutrophils)
Gram stainNegative
Wet mount preparationNumerous needle-shaped, negatively birefringent crystals

Which of the following is the most appropriate next step in management?

  1. Intra-articular triamcinolone injectionAnswer
  2. B
    Intravenous vancomycin and ceftriaxone
  3. C
    Oral indomethacin
  4. D
    Measurement of serum uric acid level
  5. E
    Venous duplex ultrasound of the right lower extremity

Answer

Intra-articular triamcinolone injection is the most appropriate next step because it safely and effectively treats acute gout in a patient with severe chronic kidney disease who cannot tolerate NSAIDs or colchicine.
The correct answer provides targeted, localized anti-inflammatory treatment for acute gout. In a patient with advanced chronic kidney disease, traditional systemic therapies such as NSAIDs and colchicine carry unacceptable risks of renal toxicity. Intra-articular glucocorticoids effectively reduce joint inflammation without significant systemic absorption, making them the ideal choice for an isolated, actively inflamed joint.

Step-by-Step Solution

1
Interpret the clinical presentation and synovial fluid analysis.
The patient has an acute monoarthritis with synovial fluid showing 42,000 WBCs/mm³ and negatively birefringent, needle-shaped crystals.
This establishes a definitive diagnosis of an acute gout flare, which is a common postoperative complication due to fluid shifts and surgical stress.
2
Evaluate the patient's comorbidities and current medication list.
The patient has stage 4 chronic kidney disease and is concurrently taking lisinopril and furosemide.
Standard first-line gout therapies like NSAIDs and high-dose colchicine are contraindicated in advanced renal impairment due to the risk of toxicity and acute kidney injury.
3
Select the optimal targeted therapy for the acute flare.
Intra-articular glucocorticoids (such as triamcinolone) are chosen for monoarticular joint involvement.
Local injection provides rapid symptom relief while bypassing the systemic side effects and renal toxicity associated with oral medications.

Key Concept

Management of acute gouty arthritis in patients with chronic kidney disease
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Topics

Rheumatology and Immunology

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