Traumatic lymphoceles are usually the result of surgical injuries or blunt trauma. Although usually described in the pelvis after radical pelvic node dissection or kidney transplantation, traumatic lymphoceles are rare. Diagnosis is based on CT scan and confirmed by fine needle aspiration with biochemical analysis. Treatment modalities are not standardized and different techniques have been described. We report herein a case of anterior thoracic wall lymphocele due to blunt trauma treated in our department.