胃息肉合并胃癌有两种情况:在同一病变内既有息肉又有癌,称之为共存;胃内两个部位分别有息肉和癌,叫做并存。据国立癌中心报告同一胃内良性息肉并存隆起型早期胃癌(Ⅰ型和Ⅱ(?)型)的发病率如下:单发良性息肉无癌并存为68/120(56.7%);二个胃息肉无癌并存占18.3%。同一胃内有二个以上息肉的不到半数。隆起型早期胃癌与息肉饼存的56例中,单发息肉占51例(91.1%);二个息肉的3例;三个息肉的2例。早期胃癌绝大多数发生在单发息肉病例中。单发性胃息肉72例,4例(5.6%)有癌;二个胃息肉的23例,1例(4.3%)有癌;三个胃息肉的12例,1例(8.3%)有癌;四个以上的胃息肉20 Gastric polyps combined with gastric cancer have two situations: in the same lesion both polyps and cancer are called coexistence; two parts of the stomach have polyps and cancer, respectively, called coexistence. According to the National Cancer Center, the incidence of the same type of intragastric benign polyp coexisting ascending type of early gastric cancer (type I and type II) was as follows: single benign polyps without cancer coexisted as 68/120 (56.7%); two gastric polyps No cancer coexisted 18.3%. There are less than half of the two or more polyps in the same stomach. Of the 56 patients with protuberant early gastric cancer and polyplets, 51 (91.1%) were single polyps, 3 were polyps, and 2 were polyps. The vast majority of early gastric cancers occur in cases of single polyps. 72 cases of single gastric polyps, 4 cases (5.6%) had cancer; 23 cases of two gastric polyps, 1 case (4.3%) had cancer; 12 cases of three gastric polyps, 1 case (8.3%) had cancer Four or more stomach polyps 20