title: [The double level. A radiological sign in the strangulation of external hernias].
mesh_terms: D003937:Diagnosis, Differential; D006547:Hernia / Q000000981:diagnostic imaging*; D006801:Humans; D008297:Male; D011860:Radiography, Abdominal
vernacular_title: El doble nivel. Un signo radiológico en la estrangulación de las hernias externas.