[Intestinal obstruction caused by a tumor of the fourth portion of the duodenum; presentation of two cases].
D004386:Duodenum; D006801:Humans; D007415:Intestinal Obstruction / Q000209:etiology*; D009369:Neoplasms
DUODENUM/neoplasms; INTESTINAL OBSTRUCTION/etiology and pathogenesis
Obstrucción por tumor de la cuarta porción del duodeno; presentación de dos casos.