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Soft Tissue Case 1 Background

Necrotizing Fasciitis


Necrotizing fasciitis is a progressive, rapidly spreading deep infection with subcutaneous necrosis. It occurs more frquently in men and in the lower extremities. Preceding trauma may be minimal, or there may be a chronic ulcer.
Risk factors include diabetes mellitus, cancer, alcoholism, vascular insufficiency, organ transplants, HIV, or neutropenia.

There are two types of necrotizing fasciitis:

  • Type 1 is polymicrobial, involves non-group A streptococci and anaerobes, and is usually affects the abdomen and perineum.
  • Type 2 is from group A Beta-hemolytic streptococci and affects the extremities.