Anastomotic-vaginal fistula (AVF) after anterior resection of the rectum for cancer - occurrence and risk factors

作者：Matthiessen P^*; Hansson L; Sjodahl R; Rutegard J

来源：Colorectal Disease, 2010, 12(4): 351-357.

DOI：10.1111/j.1463-1318.2009.01798.x

• Anastomotic-vaginal fistula
• recto-vaginal fistula
• anastomotic leakage
• anterior resection of the rectum
• rectal cancer
• risk factors

Objective
The aim of the study was to assess recto-vaginal fistula (RVF) after anterior resection of the rectum for cancer with regard to occurrence and risk factors.
Method
All female patients [median age 69.5 years, Union Internationale centre le Cancer (UICC) cancer stage IV in 10%] who developed a symptomatic RVF (n = 20) after anterior resection of the rectum for cancer from three separate cohorts of patients were identified and compared with those who developed conventional symptomatic leakage (n = 32), and those who did not leak (n = 338). Patient demography and perioperative data were compared between these three groups. Fourteen patient-related and surgery-related variables thought to be possible risk factors for RVF (anastomotic-vaginal fistula) were analysed.
Results
Symptomatic anastomotic leakage occurred in 52 (13.3%) of 390 patients. Twenty (5.1%) had an anastomotic-vaginal fistula (AVF) and 32 (8.2%) conventional leakage (CL). Patients with AVF required unscheduled re-operation and defunctioning stoma as often as those with CL. AVF was diagnosed later and more often after discharge from hospital compared with CL. Patients with AVF had lower anastomoses and decreased BMI compared with those with CL. Risk factors for AVF in multivariate analysis were anastomosis < 5 cm above the anal verge (P = 0.001), preoperative radiotherapy (P = 0.004), and UICC cancer stage IV (P = 0.005). Previous hysterectomy was a risk factor neither for AVF nor for CL.
Conclusion
Anastomotic-vaginal fistula forms a significant part of all symptomatic leakages after low anterior resection for cancer in women. Although diagnosed later, the need for abdominal re-operation and defunctioning stoma was not different from patients with CL. Risk factors for AVF included low anastomosis, preoperative radiotherapy and UICC cancer stage IV.

• 出版日期2010-4