Objective: To explore the characteristics and risks of cancer in endoscopically unresectable polyps and compare the surgical outcomes of different operations.
Methods: A retrospective review of 40 patients undergoing surgical operations for polyps unresectable at colonoscopy between August 2006 and July 2012 from Department of Gastrointestinal Surgery was performed. The follow-up period was 3 to 72 months (median: 24.5 months).
Results: The rate of endoscopically unresectable polyps with invasive cancer was 67.5% (27/40). And it was significantly influenced by patient age and number of polyps (both P < 0.01). Perioperative volume of blood loss ((86 ± 58) ml vs (44 ± 32) ml, P = 0.0066), time to first flatus ((2.7 ± 1.3) d vs (1.7 ± 0.6) d, P = 0.0018), incidence of complication (2 cases vs 0, P = 0.0365) and hospital stay ((11.2 ± 1.0) d vs (15.0 ± 5.0) d, P = 0.0164) were significantly different between open colectomy and laparoscopic group. And the long-term survival outcomes were similar in both groups (90.9% (10/11) vs 100.0% (27/27), 90.9% (10/11) vs 96.3% (26/27), both P > 0.05).
Conclusions: Endoscopically unresectable polyps of colon and rectum have high malignancy rate. Polyps in elderly patients and multiple polyps are more likely to develop invasive cancer. Long-term outcomes are similar between open colectomy and laparoscopic colectomy groups, but laparoscopic group has better short-term outcomes. For endoscopically unresectable polyps, laparoscopic colectomy may be the first choice.
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