Brand E J, Sullivan B H, Sivak M V, Rankin G B
Ann Surg. 1980 Jul;192(1):111-3. doi: 10.1097/00000658-198007000-00019.
Three hundred six patients with unexplained rectal bleeding were examined by colonoscopy. Significant lesions were found in 30% including polyps having a diameter of 0.5 cm or larger in 14%, carcinoma in 8%, and a small number of patients with inflammatory bowel disease, vascular formations, and radiation colitis. Colonoscopic findings in a large subgroup of patients with diverticulosis established by barium enema did not differ significantly from those of the group as a whole. Significant lesions were also identified in 22% of small subsets of patients with occult bleeding or unexplained melena.
对306例不明原因直肠出血患者进行了结肠镜检查。发现30%的患者存在显著病变，其中14%为直径0.5厘米或更大的息肉，8%为癌，还有少数患者患有炎症性肠病、血管畸形和放射性结肠炎。通过钡灌肠确诊的憩室病患者的一个大子组的结肠镜检查结果与整个组的结果无显著差异。在隐匿性出血或不明原因黑便患者的小亚组中，也有22%发现了显著病变。
