| Indications for colonoscopy: |
| 1.Lower GI bleeding |
| 2.Screening and surveillance of colorectal polyps and cancers: a. Colon cancer b. Surveillance after polypectomy c. Colorectal cancer post-resection surveillance d. Inflammatory bowel diseases |
| 3.Acute and chronic diarrhea |
| 4.Therapeutic indications for colonoscopy: a. Excision and ablation of lesions b. Treatment of lower GI bleeding c. Colonic decompressiond. Dilation of colonic stenosise. Foreign body removal |
| 5.Miscellaneous indications: a. Abnormal radiological examinations. b. Isolated unexplained abdominal pain c. Chronic constipation d. Preoperative and intraoperative localization of colonic lesions |
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