Abstract
In this report, an actual condition of colonoscopy in an average hospital in Japan was investigated. During the last 5 years, 1083 cases (1351 times) of colonoscopy were perfor-med in Yokohama National Hospital. Age distribution of them is showed in Figure 1. The 4th and the 5th decade formed 50% of them with male preponderance. Of symptoms, hematochezia, abdominal pain, diarrhea were prominent. Diagnosis of them are presented on Table 2. The rate of abnormality was 66.4%, and polyp, cancer, diverticulosis, ulcerative colitis were principal diseases. In comparison with barium enema examination, colonoscopy was better in diagnosis of colon diseases especially in polyp and acute colitis except in diverticulosis. As colon disturbances have remarkablly increased yearly, so training of colonoscopist should be a present need.
