Simultaneous Colon + Liver Resection: Who Is at Higher Risk of Anastomotic Leak?: Annals of Surgical Oncology | 2026

What Did the Study Find?

This nationwide study evaluated 1,517 patients undergoing simultaneous colectomy and liver resection for colon cancer with synchronous liver metastases.

Overall anastomotic leak (AL) rate was 5.3%.

Higher ASA score independently increased leak risk.

Chronic steroid use was associated with more than twice the risk of AL.

Major hepatectomy was an independent predictor of leakage.

Intraoperative blood transfusion also doubled the risk; after propensity matching, AL occurred in 10.7% vs 5.0% with versus without transfusion.

Most patients (87%) underwent only minor hepatectomy.

Why Does It Matter?

Simultaneous resection can avoid two separate operations, but combining a colorectal anastomosis with major liver surgery may substantially increase operative stress in vulnerable patients.

GastroAGI Takeaway

Patient selection matters more than a one-size-fits-all simultaneous approach. Patients requiring major hepatectomy, particularly those with high ASA status, chronic steroid exposure or anticipated transfusion requirements, may be better considered for staged surgery or fecal diversion. These observational data support individualized surgical planning rather than abandoning simultaneous resection altogether.