Fournier gangrene

Fournier gangrene is necrotizing fasciitis of the perineum. It is a true urological emergency due to the high mortality rate but fortunately, the condition is rare.

Fournier gangrene is typically seen in diabetic men aged 50-70 years, rarely in women. Other predisposing factors include:

  • perineal/scrotal pain, swelling, redness
  • crepitus from soft tissue gas (up to 65%)
  • systemically unwell
  • fever and leukocytosis

The source of infection can usually be identified, most commonly anorectal (such as from a perianal fistula or abscess) and less commonly genitourinary or perineal trauma. Sometimes the cause is not found.

The infection is usually polymicrobial. The most common organisms cultured are E.coli, Klebsiella, Proteus, Staphylococcus, and Streptococcus.

It begins as cellulitis that causes an endarteritis with thrombosis followed by a necrotizing infection that spreads through the fascial planes. The organisms often produce gas, thus causing subcutaneous emphysema.

The diagnosis is usually clinical. The role of imaging includes:

  • diagnosis not established
  • determine the extent of disease
  • detect the underlying cause

Radiolucent soft-tissue gas may be seen in the region overlying the scrotum or perineum. Subcutaneous emphysema may extend from the scrotum and perineum to the inguinal regions, anterior abdominal wall, and thighs.

  • thickened scrotal wall
    • often edematous, with linear hypoechoic fluid streaks interspersed 8
  • echogenic gas foci in the scrotum are pathognomonic 
  • testes and epididymides spared (due to their separate blood supply)
  • peritesticular fluid 7
    • anechoic fluid collections common, represent reactive hydroceles
  • soft tissue stranding, fascial thickening
  • soft tissue gas
  • the extent of disease can be assessed prior to surgery
  • cause of infection may be apparent (e.g. perianal abscess, fistula)

It is considered a urological emergency with a poor prognosis due to its high mortality rate (ranging ~15-50% 3).

Management options include:

  • immediate radical surgical debridement of necrotic tissue
  • intravenous antibiotics
  • hyperbaric oxygen therapy
  • testes replaced into the remaining scrotum or covered by skin graft (once infection settled)

It was first described by a French professor of dermatology at the University of Paris, and director of the renowned venereal Hospital of St Louis, Jean Alfred Fournier (1832-1914) 6 in 1883. He noted a fulminating gangrenous infection of male genitalia in young healthy males without an obvious cause.

The differential in the setting of acute scrotal pain includes:

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Article information

rID: 1355
System: Urogenital
Synonyms or Alternate Spellings:
  • Fournier's
  • Fournier's gangrene
  • Fournier gangrene
  • Fournier's gangrene (FG)

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