A comparison of transanal excision and endoscopic resection for early rectal cancer

Robotic transanal surgery (RTAS) with utilization of a next-generation single-port system: a cadaveric feasibility study

PURPOSE

Transanal surgery remains both an innovative approach to rectal pathology and a demonstrated technical challenge. Improved technology using a single-port system robotic platform (SPS) offers a promising option for this surgery.

METHODS

SPS robotic system was utilized to perform submucosal, full-thickness and cylindrical excision on four cadavers. Operative performance and surgeon fatigue were measured.

RESULTS

On all types of resections, the SPS system performed well. There were no piecemeal or fragmented resections. Closure was judged to be good to excellent in all cases. Surgeon assessment of setup and performance of the SPS was excellent in all cases.

CONCLUSIONS

SPS robotic transanal surgery represents an exciting new option for transanal surgery.

Approach to rectal cancer surgery

Rectal cancer is a distinct subset of colorectal cancer where specialized disease-specific management of the primary tumor is required. There have been significant developments in rectal cancer surgery at all stages of disease in particular the introduction of local excision strategies for preinvasive and early cancers, standardized total mesorectal excision for resectable cancers incorporating preoperative short- or long-course chemoradiation to the multimodality sequencing of treatment. Laparoscopic surgery is also increasingly being adopted as the standard rectal cancer surgery approach following expertise of colorectal surgeons in minimally invasive surgery gained from laparoscopic colon resections. In locally advanced and metastatic disease, combining chemoradiation with radical surgery may achieve total eradication of disease and disease control in the pelvis. Evidence for resection of metastases to the liver and lung have been extensively reported in the literature. The role of cytoreductive surgery and hyperthermic intraperitoneal chemotherapy for peritoneal metastases is showing promise in achieving locoregional control of peritoneal dissemination. This paper summarizes the recent developments in approaches to rectal cancer surgery at all these time points of the disease natural history.