A n ambitious randomized controlled study, involving 17 participating sites in the United States, Britain, and Canada, compared rates of endoscopic and symptomatic recurrence in 66 patients who had a stapled side-to-side anastomosis following ileocecal resection for Crohn's disease (CD), versus 73 patients who had a handsewn end-to-end anastomosis. For purposes of the study, endoscopic recurrence was defined as any recurrence with more than 5 aphthous ulcers at the time of a mandated 12-month colonoscopy (i.e., a Rutgeert's score of 2 or higher). Symptomatic recurrence was defined as the presence of endoscopic disease plus symptoms that ''were severe enough to require medical or surgical treatment'' based on the Crohn's Disease Activity Index (CDAI) score, C-reactive protein, and the subject's unspecified ''symptom status.'' At 1 year of follow-up, the 2 groups had similar rates of endoscopic recurrence (37.9% versus 42.5%, P ¼ 0.55) and symptomatic recurrence (22.7% versus 21.9%, P ¼ 0.92). The authors then performed a secondary analysis, which considered other factors that might be associated with recurrence: length of time since diagnosis, number of previous resections, smoking, the presence of fistula or abscess at surgery, length of small bowel affected by CD, type of surgery (open or laparoscopic), postoperative azathioprine therapy, compliance with postoperative azathioprine maintenance, and CDAI at 6 weeks postoperatively. On multivariate logistic analysis, endoscopic and symptomatic recurrence were each higher in patients who had a previous resection and lower in patients who were compliant in azathioprine maintenance therapy. (Anastomotic technique was not included as a variable in the secondary analysis, perhaps due to the assumption that randomization obviated the need to control for confounding.) 1
COMMENTSurgeons have long hypothesized that stapled anastomoses-with their longer length and side-to-side orientation-were associated with a lower rate of recurrence following ileocecal resections for CD. The hypothesis was based on several assumptions. Staples might have lower immunogenicity than sutures. They might well reduce the effects of colonic reflux. In addition, a wider, stapled anastomosis would logically lead to a decrease in fecal stasis.Consistent with these assumptions, some early data tended to support the hypothesis that stapled anastomoses were associated with better long-term recurrence rates. For example, 1 retrospective study compared 69 patients with stapled anastomoses to an equal number of patients with handsewn anastomoses. The study reported that patients who had a stapled anastomosis had a 12% symptomatic recurrence rate at 1 year, as compared to 28% in those with end-to-end handsewn anastomoses.2 At 5 years, 20% of patients treated with a handsewn anastomosis needed repeat surgery, whereas only 11% of the patients in the stapled anastomosis group did.Another retrospective study of 141 consecutive patients also reported a decreased rate of surgical recurrence in patients with wid...