1. Anus, Rectum, Sigmoid Colon;Bacon,1941
2. Degeneration of villous tumor of transverse colon; ileocecal invagination secondary to ileocecal exclusion, first step of surgical therapy;Bensaude;Arch. d. mal. de l'app. digestif.,1937
3. Villous polypus of stomach;Bonorino;An. Dispen. púb. nac. para enferm. d. ap. digest.,1944
4. Villous papilloma of the rectum;Bowman;Canad. M. A. J.,1934
5. Villoma of stomach, two cases;Brule;Presse méd.,1936