Salvaging Anastomoses After a Leak: A Practical Diagnostic and Treatment Algorithm

Anastomotic leaks are among the most feared complications in colorectal surgery, occurring after 3 to 20% of low anterior resections and 5 to 15% of ileal pouch-anal anastomoses (IPAA), historically carrying a high likelihood of permanent diversion. Over the past decade, the surgeon's ability to rescue leaking anastomosis has expanded dramatically. This article presents a practical diagnostic and treatment algorithm for salvage after a colorectal or IPAA anastomotic leak, with emphasis on the pelvic colorectal anastomosis, where the bulk of the salvage literature lies. Salvage begins with early recognition, cross-sectional imaging, and endoscopic evaluation. Initial management is determined by patient stability: the unstable or peritonitic patient requires return to the operating room for source control, while the stable patient with a contained leak can be managed by an endoscopic and percutaneous toolkit. We review the modern menu of salvage options: drainage, fibrin glue, through-the-scope and over-the-scope clips, endoluminal stents, endoluminal vacuum therapy, and endoscopic vacuum-assisted surgical closure. Marsupialization is the most reliable maneuver for chronic presacral sinus. Operative options include immediate or staged (Turnbull–Cutait) pull-through reconstruction and abdominoperineal resection. A dedicated section addresses the IPAA leak, where the absence of a salvageable alternative conduit warrants the most determined pouch-preserving efforts. Investigational strategies, including prophylactic endoluminal vacuum therapy and intraluminal anastomosis-protection devices, are discussed as potential alternatives to diversion. We conclude a tiered response matched to each patient's anatomy offers the best chance of preserving the anastomosis as well as long-term intestinal continuity.