CLINICAL STUDY ON POLYPOUS BUD OF THE STOMACH AND ITS GROWTH

Abstract

Polypous bud is an important key to clarify the appearance and the growth of hyperplastic polyp of the stomach. Investigations concerning characteristics of polypous bud and its growth were performed endoscopically and histopathologically with a follow-up study. The following results were obtained. 1) Polypous bud is defined as slight mucosal elevation with red tone with 3 mm in size. And it is thought to be the earliest stage of the hyperplastic polyp detected endo-scopically in the process of polypous growth. 2) Histological finding of polypous bud is different from that of hyperplastic polyp. And that of polypous bud is presumed to progress to typical one of hyperplastic polyp as polypous bud grows up. 3) Fifty-two lesions of polypous bud were followed up more than 6 months. It was observed that 10 lesions enlarged in the size. In these lesions gastric antrum was the favorite site of occurrence. As growth pattern of those lesions, there are speedy and gradual tvpes and the latter type was observed more commonly. 4) Some hyperplastic polyps grow up definitely from polypous bud. 5) Preceded mucosal change of the stomach was not detected endoscopically, but it was presumed to take less than 10 months till appearance of polypous bud.