From Lateral Ankle Sprain to Above-Knee Amputation: A Unique Case Report of Group A Streptococcus Necrotizing Soft-tissue Infection.

Introduction: Necrotizing fasciitis, also referred to necrotizing soft-tissue infection (NSTI), is an infrequent entity that results in orthopedic consultation. It is a rapidly spreading typically associated with a contaminated wound that spreads rapidly along fascial planes resulting in significant morbidity and mortality. However, it is a rare occurrence that such pathology occurs in an atraumatic fashion, which is without a wound through the skin.