Conversion-to-open of laparoscopic surgery for rectal cancer: Impact on outcomes
Low anterior resection of the rectum (LARR) with total mesorectal excision (TME) for rectal cancer by laparoscopy is considered very technically demanding, particularly at the stages of dissection around the mesorectal fascia deep into the pelvis and transection of the rectum distally to the tumour. These technical difficulties translate to an increased conversion-to-open rate, higher than that seen after laparoscopic surgery for colon cancer. Conversion-to-open is considered as a technical limitation of the approach rather than a complication. There are reports claiming that converted cases are associated with higher morbidity rates than the laparoscopically completed. However, a review of the published articles indicates that conversion-to-open shows similar overall morbidity and mortality rates to those seen in the laparoscopically completed LARR-TME cases, and only duration of surgery is longer and wound infection rate is higher in the former group. Similarly, the overall oncological outcomes, namely local recurrence, distant metastasis and overall survival rates, are similar between the two groups.