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Difficulty: MediumUrologic Surgery

A physician evaluates a patient in the surgical triage area. The patient is a male in his late 50s with a 15-year history of poorly controlled type 2 diabetes mellitus. He presents with rapidly worsening genital pain and swelling over the past 24 hours, accompanied by high fevers and general malaise. His temperature is 39.2∘C39.2^\circ\text{C} (102.6∘F102.6^\circ\text{F}), pulse is 122/min122/\text{min}, and blood pressure is 92/58 mmHg92/58 \text{ mmHg}. Physical examination reveals a markedly edematous, erythematous scrotum and perineum. There are several patches of dark, purplish skin necrosis over the right hemiscrotum. Palpation of the affected area elicits exquisite pain along with a distinct crackling sensation beneath the skin. Laboratory studies show a leukocyte count of 24,500/μL24,500/\mu\text{L} with 15%15\% bands, and a serum glucose of 385 mg/dL385 \text{ mg/dL}. Which of the following is the most appropriate immediate next step in management?

  1. Emergent surgical exploration and wide debridementAnswer
  2. B
    Intravenous administration of broad-spectrum antibiotics and admission to the intensive care unit
  3. C
    Computed tomography of the abdomen and pelvis with intravenous contrast
  4. D
    Bedside needle aspiration of the scrotal tissue for gram stain and culture
  5. E
    Scrotal ultrasonography with Doppler color flow

Answer

Emergent surgical exploration and wide debridement
The correct action is emergent surgical exploration and wide debridement. This patient's presentation of high fever, hemodynamic instability, scrotal skin necrosis, and crepitus (subcutaneous gas) in the setting of poorly controlled diabetes is pathognomonic for Fournier gangrene. This is a fulminant necrotizing fasciitis of the perineum and external genitalia. Because the infection spreads rapidly along fascial planes and is highly lethal, the single most critical step in management is immediate surgical source control to excise all non-viable tissue. While broad-spectrum antibiotics and fluid resuscitation are initiated simultaneously, surgery must not be delayed.

Step-by-Step Solution

1
Identify the primary clinical syndrome based on vital signs and physical examination.
The patient has systemic toxicity (hypotension, fever, tachycardia, profound leukocytosis) paired with severe perineal pain, skin necrosis, and palpable crepitus.
These findings are the hallmark of necrotizing fasciitis of the perineal and genital region, known as Fournier gangrene.
2
Identify the pathophysiology and primary risk factors associated with the diagnosis.
Fournier gangrene is a rapidly progressive, polymicrobial infection that spreads along fascial planes (Colles, Dartos, and Scarpa fascia). Poorly controlled diabetes mellitus is a classic predisposing risk factor.
Understanding the aggressive spread along fascial planes dictates the urgency and extent of the required intervention.
3
Determine the most appropriate immediate next step in management for a hemodynamically unstable patient with a clinically obvious necrotizing infection.
Immediate surgical exploration and wide debridement of all necrotic tissue is required.
Surgical source control is the single most important determinant of survival in necrotizing fasciitis. Delaying surgery for any reason, including imaging or awaiting the effects of antibiotics, significantly increases mortality.

Key Concept

Fournier gangrene is a life-threatening necrotizing fasciitis of the perineum and scrotum that requires immediate surgical exploration and wide debridement; clinical diagnosis (crepitus, skin necrosis) should prompt surgery without delaying for imaging.
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Topics

Urologic Surgery

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