Roux-en-Y hepaticojejunostomy or hepaticoduodenostomy for biliary reconstruction during the surgical treatment of choledochal cyst: which is better?

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Executive Summary

The surgical treatment of choledochal cyst (CC) requires primary cyst excision followed by biliary reconstruction. This briefing evaluates the clinical outcomes of two primary reconstruction techniques: Roux-en-Y hepaticojejunostomy (RYHJ) and hepaticoduodenostomy (HD).

Evidence indicates that RYHJ is the superior surgical approach due to a significantly lower rate of postoperative complications. While HD was historically favored by some for its technical simplicity and perceived physiological advantages, it is associated with a high incidence (33.3%) of endoscopy-proven bilious gastritis caused by duodenogastric bile reflux. In contrast, RYHJ demonstrates a lower complication rate (7.1%), primarily involving manageable adhesive bowel obstructions. Long-term risks associated with HD, including the potential development of hilar bile duct carcinoma and chronic gastric mucosa damage, have led clinical experts to transition exclusively to RYHJ for biliary reconstruction.

Study Overview and Methodology

A retrospective review was conducted on 86 patients who underwent primary cyst excision for CC between 1986 and 2002. The study focused specifically on the influence of the biliary reconstruction technique by excluding cases with concurrent intrahepatic bile duct dilatation (IHBD), as HD is typically not utilized when IHBD is present.

Patient Cohort Characteristics

After excluding 46 RYHJ cases with IHBD, the study compared 40 patients:

Characteristic

RYHJ Group (n=28)

HD Group (n=12)

Mean Age at Excision

4.0 ± 3.9 years

7.4 ± 2.0 years

Mean Follow-up Length

8.7 ± 5.4 years

7.9 ± 1.5 years

Cystic Type CC

16 cases

6 cases

Fusiform Type CC

7 cases

1 case

Minimal Type CC

5 cases

5 cases

All subjects in the study presented with pancreaticobiliary malunion. Statistical analysis showed no significant differences between the two groups regarding CC type, age at excision, or length of follow-up, allowing for a direct comparison of reconstruction outcomes.

Comparative Analysis of Postoperative Complications

The incidence of postoperative complications related to the type of biliary reconstruction was significantly higher in the HD group compared to the RYHJ group (p < .05).

Hepaticoduodenostomy (HD) Complications

Complications occurred in 42% (5/12) of patients in the HD group:

  • Bilious Gastritis: 33.3% (4/12) of patients developed gastritis proven by upper gastrointestinal endoscopy.

    • Mechanism: Reflux of duodenal contents and bile into the stomach.

    • Clinical Presentation: Patients suffer from persistent epigastric discomfort.

    • Pathology: Endoscopy reveals marked duodenogastric bile reflux. Histology confirms mild gastritis characterized by inflammatory cell infiltration and bleeding in the lamina propria mucosae.

  • Liver Dysfunction: One case of temporary postoperative liver dysfunction was noted, though it was deemed not directly related to the reconstruction technique.

Roux-en-Y Hepaticojejunostomy (RYHJ) Complications

Complications occurred in 7.1% (2/28) of patients in the RYHJ group:

  • Adhesive Bowel Obstruction: Two cases were recorded. One case was further complicated by cholangitis.

  • Resolution: Both cases were successfully managed with conservative therapy, and patients remain well without recurrence.

  • Peptic Ulceration: While some literature notes peptic ulceration after RYHJ in adults, no cases were observed in this pediatric cohort.

Clinical and Pathological Considerations

The Risks of Duodenogastric Reflux

The high incidence of bilious gastritis in HD patients is a primary clinical concern. The exposure of gastric mucosa to bile and pancreatic secretions is known to increase the risk of carcinoma in adults (specifically in the residual stomach following distal gastrectomy). The study emphasizes that such exposure should be avoided in children to prevent long-term mucosal damage and potential malignancy.

Intrahepatic Reflux and Malignancy

A critical factor in the shift away from HD is the risk of duodenal contents—including activated pancreatic enzymes—refluxing through the HD anastomosis into the intrahepatic bile ducts.

  • Biliary Carcinoma: Recent clinical evidence identified a case of hilar bile duct carcinoma developing 19 years after an HD procedure.

  • Mucosal Hazards: Reflux into the bile ducts is considered hazardous to the bile duct mucosa, potentially leading to cholangitis, anastomotic strictures, or late-stage malignancy.

Historical Context vs. Modern Practice

Historically, HD was favored by some surgeons because it was considered:

  1. More physiological than RYHJ.

  2. Simpler to perform technically.

  3. Less prone to adhesive bowel obstructions and anastomotic leakage compared to the two-anastomosis RYHJ procedure.

However, the significant risk of reflux-related complications and the long-term threat of carcinoma have superseded these benefits.

Conclusion

The data demonstrates that HD is not the ideal method for biliary reconstruction in the surgical treatment of choledochal cyst due to a 33.3% incidence of bilious gastritis and the associated risks of chronic mucosal irritation. While RYHJ carries a minor risk of adhesive bowel obstruction, its overall complication rate is significantly lower and it avoids the hazardous duodenogastric reflux inherent to HD. Consequently, RYHJ is recommended as the exclusive technique of choice for biliary reconstruction.