Effectiveness of sacral nerve stimulation in fecal incontinence after multimodal oncologic treatment for pelvic malignancies: a multicenter study with 2-year follow-up.

BACKGROUND

To assess whether sacral nerve stimulation (SNS) is an effective treatment for severe fecal incontinence (FI) after radiotherapy (RT)/chemoRT (CRT) in combination with pelvic surgery.

METHODS

A multicenter study was conducted on patients with FI that developed after multimodal therapy for pelvic tumors and was refractory to non-operative management, who were treated with SNS between November 2009 and November 2012. Data were prospectively collected and retrospectively analyzed. Cleveland Clinic FI score (CCFIS), FI episodes per week, FI Quality of Life (FIQoL), anorectal manometry and pudendal nerve terminal motor latency were evaluated before and after SNS.

RESULTS

Eleven patients (seven females, mean age 67.3 ± 4.8 years) were evaluated in the study period. Multimodal treatments included surgery and CRT (four rectal, two cervical and one prostate cancers), surgery and RT (one cervical and two endometrial cancers) and CRT (one anal cancer). The mean radiation dose was 5.3 Gy, and mean interval between the end of RT and onset of FI was 43.7 ± 23 months. Before SNS, the mean CCFIS and the mean number of FI episodes per week were 15.7 ± 2.8 and 12.3 ± 4.2, respectively. At 12-month follow-up, mean CCFIS improved to 3.6 ± 1.8 (p = 0.003) and the mean number of FI episodes decreased to 2.0 ± 1.9 per week (p = 0.003). These results persisted at 24-month follow-up. Significant improvement was also observed for each of the four domains of FIQoL at 12- and 24-month follow-up. Anorectal manometry values did not change significantly at follow-up.

CONCLUSIONS

SNS is feasible and may be an effective therapeutic option for FI after multimodal treatment of pelvic malignancies.