“…Aetio1ogy.-Many causal factors of benign duodenocolic fistula have been suggested. Ten reported cases are thought to have been due to peptic ulceration with perforation into the colon (McPeak, 1940 (2 cases); McClinton, 1944; Railton, 1948;Olson, 1951;Rife, 1951; Nash and Daland, 1956; Pautler, Woodall, and Gaither, 1958; Starzl, Dorr, and Meyer, 1959; Grayson and O'Connell, 1960). This ascription was questioned by Rosenqvist and Sjoberg (1955) on the grounds of the site and sex distribution of the cases reviewed by them.…”