A 54-year-old woman with a history of endometriosis is referred to you for worsening constipation, bloating, and pelvic pain. She previously underwent a laparoscopic-assisted hysterectomy with bilateral salpingo-oophorectomy. You perform a colonoscopy and identify a stricture at the rectosigmoid; the rest of her colon was normal. Pelvic magenetic resonance imaging (MRI) shows irregular thickness with three large spiculated nodules that were hypointense on T1- and T2-weighted images, encasing 70% of the wall of the rectosigmoid, consistent with endometriosis. What is the best surgical option for this patient?