Abstract
In Japan, the rising number of patients with longstanding ulcerative colitis (UC) has resulted in an increased number of cases of UC-associated neoplastic lesions. Therefore, colonoscopic surveillance is recommended by most authorities for early detection of dysplasia or colitic cancer. However, UC-associated neoplastic lesions in inflamed mucosa are sometimes difficult to identify endoscopically. Recent improvements in endoscopic diagnosis have improved neoplasia detection in UC cases. The physician needs to become familiar with the characteristics of the endoscopic appearance of those lesions when taking the target biopsy.
