1001 Poster Colon IS INTRA-OPERATIVE COLONOSCOPY WORTHWHILE? A. Ferdman1,2, Y. Adler1,3, A. Shternberg1,4, A. Segal1 1 Kupat Holim Leumit, 2Lainiado Hospital, Netanya 3 Chaim Sheba Medical Center, Tel Hashomer, 4 Hillel Yaffe Medical Center, Hadera Recent years have shown an increase in the requirement for resection of colonic polyps or early colonic carcinomas that are non-resectable during colonoscopy. This situation often leads to difficulty in identification of these lesions during surgery especially laparoscopic. Intra-operative colonoscopy is of assistance in these circumstances. Twenty four patients are described where intra-operative colonoscopy was performed. In eleven patients-sessile colonic polyps were identified. In six patients adenocarcinoma in-situ was identified in the colon. In seven patients early infiltrating adenocarcinoma of the colon was identified. Fifteen patients had undergone previous abdominal surgery and of these fifteen patients six had more that four operations. Only by performing intra-operative colonoscopy was is possible to identify early colonic carcinoma in three patients. My experience has shown that intra-operative colonoscopy has enabled: 1. Better preparation and planning of the surgical procedure 2. A more conservative abdominal wall incision 3. More exact and easier localization of the site of the lesion during surgery especially laparoscopy and the prevention of excessive resection of the colon 4. Minimizing surgical time. 5. Limits additional preparation of the colon 6. Decreases additional patients discomfort