necrotizing soft tissue infection
Also written as: NSTI — Necrotizing Soft Tissue Infection
Rapidly spreading deep tissue infection causing progressive necrosis and systemic toxicity.
Full Definition
Necrotizing soft tissue infection (NSTI) is a life-threatening bacterial infection characterized by rapid spread along fascial planes with progressive tissue necrosis and systemic toxicity. These infections can be categorized as Type I (polymicrobial) or Type II (monomicrobial, often Group A Streptococcus). The hallmark of NSTI is tissue necrosis that spreads faster than would be expected from the surface appearance, often with minimal initial skin changes despite extensive deep involvement. Early recognition is critical as mortality increases dramatically with delayed treatment. Clinical features include severe pain disproportionate to physical findings, rapid progression, systemic toxicity, and late skin changes including bullae and necrosis. Treatment requires immediate aggressive surgical debridement combined with broad-spectrum antibiotics and supportive care. Multiple debridement procedures are typically necessary.
Usage
Usage note: More precise than 'necrotizing fasciitis' as it encompasses infections of various soft tissue layers.
In Context
- "The patient underwent emergent surgical exploration for suspected necrotizing soft tissue infection." — emergency surgery consultation
- "Pathology confirmed necrotizing soft tissue infection with extensive fascial involvement requiring wide debridement." — surgical pathology report