Surgical Management by Disk Excision or Rectal Resection of Low Rectal Endometriosis and Risk of Low Anterior Resection Syndrome: A Retrospective Comparative Study

Abstract

To assess the risk of low anterior resection syndrome (LARS) between women managed by either disk excision or rectal resection for low rectal endometriosis. Retrospective study of a prospective database. University hospital. One hundred seventy-two patients managed by disk excision or rectal resection for deep endometriosis infiltrating the rectum <7 cm from the anal verge. Rectal disk excision and/or segmental resection using transanal staplers. One hundred eight patients (62.8%) were treated by disk excision (group D) and 64 (37.2%) by rectal resection (group R). All patients answered the LARS score questionnaire. Follow-up was 33.3 ± 22 months for group D (range 12-108 months) and 37.3 ± 22.1 months (range 12-96 months) for group R (p=.25). The rates of rectovaginal fistula and pelvis abscess requiring radiologic drainage and surgery in the D and R groups were, respectively, 7.4% and 8.3% vs 7.8% and 9.3%. The rate of women with normal bowel movements postoperatively was higher in group D (61.1% vs 42.8%, p=.05). Women enrolled in group R reported higher frequency of stools (p <.001), clustering of stools (p=.02), and fecal urgency (p=.05). Regression logistic model revealed 2 independent risk factors for minor/major LARS: performing low rectal resection (adjusted odds ratio 2.28; 95% confidence interval, 1.1-4.7) and presenting with bladder atony requiring self-catheterization beyond postoperative day 7 (adjusted odds ratio 2.52; 95% confidence interval, 1.1-5.8). The probability of normal bowel movements is higher after disk excision than after low rectal resection in women with deep endometriosis infiltrating the low rectum.