Examkin

Soru

Zorluk: OrtaInfectious Diseases

An otherwise healthy 30-year-old construction worker presents to an urgent care center reporting localized pain and swelling on his left thigh that began four days ago. He recalls a minor abrasion at the site but denies fevers, chills, or systemic symptoms. His vital signs are within normal limits. Physical examination demonstrates a 3.5-cm, exquisitely tender, erythematous, and fluctuant nodule on the anterolateral aspect of the left thigh. There is spontaneous drainage of a small amount of purulent fluid. No surrounding induration extending beyond the immediate area, crepitus, or regional lymphadenopathy is appreciated. Which of the following is the most appropriate management for this patient?

  1. A
    Perform incision and drainage and prescribe a course of oral trimethoprim-sulfamethoxazole
  2. B
    Perform incision and drainage and prescribe a course of oral cephalexin
  3. Perform local incision and drainage without adjunctive antimicrobial therapyCevap
  4. D
    Prescribe a course of oral clindamycin and apply warm compresses without drainage
  5. E
    Administer a dose of intravenous vancomycin and refer for surgical debridement

Cevap

Perform local incision and drainage without adjunctive antimicrobial therapy
For a mild, localized purulent skin abscess in an immunocompetent patient with normal vital signs, incision and drainage (I&D) alone is the standard of care and provides definitive treatment. Systemic antimicrobial therapy does not significantly improve cure rates in this specific population. Antibiotics should only be added for moderate to severe infections, defined by the presence of systemic inflammatory response signs (fever, tachycardia), multiple or very large lesions, extremes of age, immunosuppression, or failure to respond to initial I&D.

Adım Adım Çözüm

1
Evaluate the clinical presentation and physical exam findings.
The patient has a 3.5-cm, localized, fluctuant nodule with purulent drainage, characteristic of a simple cutaneous abscess.
Accurate identification of the lesion type (purulent vs. non-purulent) directs the initial management algorithm.
2
Assess for markers of systemic toxicity and patient risk factors.
The patient is afebrile, hemodynamically stable, immunocompetent, and the lesion is relatively small (< 5 cm) without extensive surrounding cellulitis.
Stratifying the severity of a skin and soft tissue infection (SSTI) as mild, moderate, or severe determines the need for systemic antibiotics.
3
Determine the appropriate intervention based on established treatment guidelines.
For a mild purulent SSTI, physical source control is sufficient; systemic antimicrobials are withheld.
Proper antibiotic stewardship dictates that incision and drainage (I&D) alone is curative for mild abscesses, preventing unnecessary antibiotic exposure and resistance.

Anahtar Kavram

The primary and definitive treatment for a mild, uncomplicated purulent skin and soft tissue infection (abscess) in a healthy patient without systemic signs of illness is incision and drainage alone.
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