a high degree of epithelial dysplasia in hyperplastic polyps was found in 22.2 % of billroth-ii resection patients , in 6.3 % of gastroenterostomy patients and in only 2.6 % of the control group , with a significant difference between the operated and the nonoperated stomachs .
C0192444
billroth-ii
C0038351
stomachs