A 24-year-old woman undergoes buttock's liposuction as an outpatient procedure. As she went back home, progressive dyspnea, respiratory distress and collapse developed. At hospital admission, she was dyspneic with thoracic oppression, tachycardia and anguish. Chest X-ray and thoracic CT scan suggested a pulmonary localisation of fat emboli. Symptomatic treatment allowed complete recovery. This report discusses diagnosis of fat emboli after liposuction as well as epidemiology and physiopathology.