The authors report 10 clinical, endoscopical and evolutive cases of ischemic colitis in young adults, selected from histological criterions, characteristic of the affection. The symptoms are relatively similar in all the observations with constant haemorrhage. The lesions predominate in the left colon. The etiological investigation is frequently positive. The lesions consecutive to sports and contraceptive pill are emphasized. It is important to notice, in most cases, a favourable evolution with total recuperation, histologically confirmed in 4 out of 5 patients after biopsy control.