Abstract
In 19 cases with transient-type ischemic colitis, 21 lesions were observed in our hospital in the past 4 years. The course of these lesions were classified into 4 groups by the endoscopic observation.a) erosion→healed stage (2 lesions)b) erosion→irregular ulcer→healed stage (6 lesions)c) erosion→irregular ulcer→linear ulcer→healed stage (1 lesion)d) erosion→linear ulcer→healed stage (12 lesions) Irregular ulcer was observed within 2 weeks after the onset. Linear ulcer was observed not only in early times but also in late times and seen most frequently, so it may be a valuable clue to the diagnosis of ischemic colitis. The lesions healed endoscopically within 3 weeks on the average, earliest in 10 days. 5 lesions were found to be hemosiderin-laden in the biopsy specimens.