Acute onset of a swollen leg with crepitus: A complication with rectal perforation

Crepitus happened into the soft tissue is indicated subcutaneous emphysema. Subcutaneous emphysema of leg without trauma was likely to diagnose gas gangrene or gas-forming myonecrosis (GFM) at emergency department (ED). On the other hand, abdominal fatal condition with gas from the gut may spread to the leg should be considered a different diagnosis. We report a case of critically ill patient who presented to the ED with initial features suggestive of necrotizing fasciitis with gas gangrene of left leg. Assessment and further intervention revealed subcutaneous emphysema of leg secondary to a perforation of rectum associated with previous anastomosis site for rectal cancer surgery. Subcutaneous emphysema of the leg rarely happened secondary to perforation of the gastrointestinal tract and has often created serious diagnostic problems which may lead to mortality. Consequently, prompt diagnosis and aggressive treatment is imperative. Physicians and surgeons should be aware of this condition that could be fatal but curable by early intervention.