Laparoscopy-assisted posterior low anterior resection of rectal cancer

Anatomical, surgical and clinical considerations related with operative procedures performed in combined abdominal and perineal approaches for the treatment of lower rectal cancer

Background and aim Combined abdominal and perineal (anterior or posterior) approaches used in lower rectal cancer surgery have been based on similar anatomical and surgical features. The main aim of this manuscript is to evaluate the results of combined approaches performed for lower rectal cancer and to comment on surgical and anatomical features of the operations.

Methods Anatomical, surgical and clinical details of the combined abdominal and perineal approaches performed for lower rectal cancer were evaluated by reviewing published articles about this subject in English in PubMed, EMBASE, Cochrane library and other sources.

Results Ten articles including case reports were found on combined abdominal and perineal approaches published between 2003 and 2015. There were 83 patients who had been operated by using combined approaches for lower rectal cancer surgical treatment in these series. While the circular resection margine positivity had not been reported in the cases; the mean Wexner continence score had been reported between 5 and 5.5. The most important dissatisfaction of these surgical methods has been reported as persistent perineal fistulas encountered 9.6% of the patients in average in the postoperative period.

Conclusion The APPEAR (Anterior Perineal Plane for Ultra Low Anterior Resection) procedure is the most known surgical procedure in which the combined abdominal and anterior perineal approach is used. Combined abdominal and perineal (anterior or posterior) approaches can be described as surgical procedures in which the sphincter-saving extrasphincteric dissection and proximal segmental sphincteric excision techniques are performed.

Laparoscopic resection of lower rectal cancer with telescopic anastomosis without abdominal incisions

AIM: To assess laparoscopic radical resection of lower rectal cancer with telescopic anastomosis through transanal resection without abdominal incisions.

METHODS: From March 2010 to June 2014, 30 patients (14 men and 16 women, aged 36-78 years, mean age 59.8 years) underwent laparoscopic radical resection of lower rectal cancer with telescopic anastomosis through anus-preserving transanal resection. The tumors were 5-7 cm away from the anal margin in 24 cases, and 4 cm in six cases. In preoperative assessment, there were 21 cases of T₁N₀M₀ and nine of T₂N₀M₀. Through the middle approach, the sigmoid mesentery was freed at the root with an ultrasonic scalpel and the roots of the inferior mesenteric artery and vein were dissected, clamped and cut. Following the total mesorectal excision principle, the rectum was separated until the anorectal ring reached 3-5 cm from the distal end of the tumor. For perineal surgery, a ring incision was made 2 cm above the dentate line, and sharp dissection was performed submucosally towards the superior direction, until the plane of the levator ani muscle, to transect the rectum. The rectum and distal sigmoid colon were removed together from the anus, followed by a telescopic anastomosis between the full thickness of the proximal colon and the mucosa and submucosal tissue of the rectum.

RESULTS: For the present cohort of 30 cases, the mean operative time was 178 min, with an average of 13 positive lymph nodes detected. One case of postoperative anastomotic leak was observed, requiring temporary colostomy, which was closed and recovered 3 mo later. The postoperative pathology showed T₁-T₂N₀M₀ in 19 cases and T₂N₁M₀ in 11 cases. Twelve months after surgery, 94.4% patients achieved anal function Kirwan grade 1, indicating that their anal function returned to normal. The patients were followed up for 1-36 mo, with an average of 23 mo. There was no local recurrence, and 17 patients survived for > 3 years (with a survival rate of 100%).

CONCLUSION: Laparoscopic radical resection of lower rectal cancer with telescopic anastomosis through transanal resection without abdominal incisions is safe and feasible.