1984 Volume 26 Issue 11 Pages 1896-1903
46 "pm" gastric cancers, the invasion of which was limited to the muscularis propriae, among 472 cases of gastric cancers operated during a 4 year period from 1978 to 1982 were studied endoscopically, macroscopically, and histologically. Macroscopically, pm cancers are divided into Borrmann type and early cancer-like type. 16 cases (34.8%) of pm cancers were Borrmann type, and Borrmann 2 type was most often seen. Histologically, well differentiated adenocarcinomas were most frequent in this group. 30 cases (65.2%) were early cancer-like type, and the IIc type was most often seen. The proportion of well differentiated adenocarcinomas and undifferentiated adenocarcinomas were almost the same in this group. A histological relationship between marginal findings such as nodular protrusions and degree of the infiltrating depth was studied in early cancer-like "pm" cancers. Well differentiated adenocarcinomas in this type showed some correlation between degree of the marginal protrusion and the infiltrating depth, but there was no correlation in undifferentiated adenocarcinomas because marked fibrosis and edema in the submucosa elevating the mucosal surface. Therf ore, the diagnosis of the infiltrating depth was much more difficult in the undif f erenrentiated adenocarcinomas than in the differentiated adenocarcinomas.
