Guideline for Selecting Billroth I versus Billroth II Reconstruction after Distal Gastrectomy

Anatomical and Technical Characteristics

Billroth I (gastroduodenostomy) creates a direct gastroduodenal anastomosis that preserves the normal anatomical flow of gastric contents through the duodenum. 1
Billroth II (gastrojejunostomy) involves a gastro‑jejunal anastomosis with closure of the duodenal stump, forming separate afferent and efferent jejunal limbs and completely bypassing the duodenum. [1][4]

Tumor involvement of the pylorus or duodenum – Billroth II is recommended because it allows a second‑stage surgical option if recurrence occurs and is especially appropriate for lower‑third gastric cancers with duodenal extension. 1
Tumors confined to the distal stomach without pyloric or duodenal invasion – Billroth I is appropriate. 1
Adequate healthy duodenal tissue permitting tension‑free anastomosis – Billroth I can be performed safely. [2][3]

Roux‑en‑Y reconstruction provides superior functional results and reduces bile reflux compared with either Billroth I or Billroth II. [2][3]

The altered anatomy of Billroth II creates challenges for ERCP and other biliary interventions; the “upside‑down” papilla orientation requires modified sphincterotomy techniques. 4
In Billroth II patients, forward‑viewing endoscopes achieve higher success rates for biliary access than conventional duodenoscopes (approximately 87 % vs 68 %). 4

Avoid performing Billroth I when there is pyloric or duodenal tumor invasion, as this eliminates the possibility of a salvage operation for recurrence. 1
Ensure sufficient duodenal mobilization before committing to Billroth I to prevent tension on the anastomosis. [2][3]
When bile‑reflux prevention is a priority, consider Roux‑en‑Y reconstruction, acknowledging a higher risk of postoperative retention syndrome. [1][2]3

Both Billroth I and Billroth II are oncologically safe provided that adequate resection margins are achieved; neither technique compromises the radicality of gastrectomy. 1