1993 Volume 42 Pages 91-95
The preoperative endoscopic findings and the clinicopathological features were analyzed in the early antral cancer cases in which the center of the cancerous lesion was located within 2cm from the pyloric ring.
From April 1982 to March 1992, 46 cases of early pyloric cancers defined as above were resected in our department. In these early pyloric cancers, 22 cases were diagnosed by preoperative endoscopic examination being attached to the pyloric ring. Among these 22 cases, 7 cases revealed duodenal invasion on the resected specimen. The remaining 24 cases, which were apart from the pyloric ring by the preoperative endoscopic examination, had no duodenal invasion histologically. The characteristics of endoscopic findings of the duodenal invasion in the early pyloric cancer cases were concluded as follows :
1) The cancerous lesion attached to the pyloric ring.
2) The macroscopic type being a IIc depressed type.
3) The size of cancerous lesion measuring 2.0 cm or more, with the transverse dimension of cancerous lesion being wider than the longitudinal dimension.
4) Especially, the lesion having a formation of the pseudopyloric ring.
