We present a 77-year-old woman with suspicion of hepatogenic and lymphogenic metastatic coloncarcinoma who developed a rapidly expanding subcutanaeous emphysema and hematoma formation. Computerized tomography (CT) pelvis with contrast revealed extensive free air in abdomen and leg compatible with fasciitsnecroticans. Blood cultures came out positive for Clostridium septicum. Despite intravenous antibiotics her condition deteriorated rapidly and she passed away.