ABSTRACT
The concept that carcinomas of the colon and rectum derived from benign adenoma was observed by C. Dukes of St. Mark’s Hospital, London, in 1926. Numerous studies, based on tumor registry reports, hospital records, pathology reports, surgical specimens, and colonoscopy show a coexistence of adenomas and adenocarcinomas of the colon and rectum ranging from 13% to 62%. Colonoscopy has revolutionized the management of large bowel polyps. Most polyps throughout the entire colon and rectum can be excised through the colonoscope with minimal morbidity. Polyps of the colon and rectum that are too numerous for colonoscopy and polypectomies should have an abdominal colectomy with ileorectal anastomosis or proctocolectomy with ileal pouch-anal anastomosis or an ileostomy. M. Miettinen et al studied all the mesenchymal neoplasms involving the rectum and anus coded as leiomyoma, leiomyosarcoma, smooth muscle neoplasm, schwannomas, neurofibromas, nerve sheath, stromal neoplasm.
