Abstract
Dye spraying method has been used jointly with routine rectosigmoidscopy in 217 cases complaining of diarrhea or lower abdominal discomforts. Age distribution of the above patients ranged from 17 to 78, and 46.6 in the average. After finishing the ordinary endoscopic observation of the rectum, 0.13% solution of indigocarmine was sprayed on the rectal mucosa under the direct vision. Sixty four minute polypoid lesions among 217 cases (29.5%) which were too small to be found out by ordinary endoscopic examination were detected through the contrast effect of the dye. Biopsy specimens revealed histologically tubular adenoma with mild atypia in 9, metaplastic polyp in 15 and solely rectal mucosa in 39 cases. In one particular case, scattering small polypoid lesions showed adenocarcinoma, which was confirmed later in autopsy to be a case with rectal metastasis from gastric cancer. It may be said that a dye-spraying method used jointly with rectosigmoidoscopic examination is useful not to overlook the small polypoid lesions.
