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Background: Chyle leakage is a well-known but poorly characterized complication after pancreaticoduodenectomy (PD). No study examined the chyle leakage after robotic PD (RPD). Methods: Data regarding chyle leakage were prospectively collected and analyzed from patients undergoing RPD or open PD (OPD). Results: The study included 118 RPD and 165 OPD. Overall chyle leakage rate was 12.0%, with 13.6% for RPD and 10.9% for OPD. Chyle leakage was eventually resolved in all patients through conservative treatment. The drainage volumes were significantly higher in chyle leakage group from postoperative days (PODs) 1-7, with a median of 240 mL on POD 1 and POD 7, as compared to 160 mL on POD 1 and 70 mL on POD 7 for those without chyle leakage. The number of lymph nodes involved and resected and pancreatic head adenocarcinoma affected the risk of developing chyle leakage, whereas the surgical approach used (RPD or OPD) did not. Conclusions: Chyle leakage after PD is not rare, and it can eventually be resolved through conservative treatment. The extent and radicality of the surgery probably have a significant effect on the risk of developing chyle leakage, but the surgical approach used does not. K E Y W O R D S chyle, leakage, open, pancreaticoduodenectomy, robotic

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Background: This study aimed to clarify the feasibility and justification of pancreatic head sparing (PHS) enucleation for patients with agenesis of the dorsal pancreas (ADP) associated with a solid pseudopapillary tumor (SPT). Methods: Data of the SPT patients with and without ADP, including clinical presentations, surgical options, and surgical and survival outcomes, were recruited for comparison. Results: A total of 31 patients with SPTs were included, three of whom displayed ADP and underwent PHS enucleation. Surgical complications were comparable between the groups. Overall, the 5- and 10-year disease-free survival rates were 100% and 90%, respectively. The 20- and 25-year overall survival rates were 100% and 66.7%, respectively. Only one patient (3.2%) developed tumor recurrence 7.3 years after pancreatectomy for an SPT with lymph node involvement, and the patient survived 24.5 years after the initial operation. No tumor recurrence occurred in any patient with ADP after PHS enucleation. Conclusion: PHS enucleation seems to be feasible and justifiable for SPT patients with ADP in terms of surgical and survival outcomes, and this approach could be recommended to avoid pancreatic insufficiency.

Pancreaticoduodenectomy, so‐called “Whipple operation,” is a time‐consuming and technically demanding complex operation. Traditionally, this procedure has been performed most usually by open approach, which results in a large and painful wound. With the introduction of laparoscopic and robotic surgery, minimally invasive surgery (MIS) has emerged as a worldwide trend to improve wound cosmesis and to minimize wound pain. Although MIS for pancreaticoduodenectomy has also been attempted at some centers, the role of MIS, either robotic or laparoscopic approach, has not been well‐established for complex pancreaticoduodenectomy. Given that laparoscopic pancreaticoduodenectomy has been limited by its technical complexity and the high level of advanced laparoscopic skills required for pancreatic reconstruction, a robotic surgical system is introduced to overcome several limitations related to the laparoscopic approach. Providing high‐quality three‐dimensional (3‐D) vision, high optical magnification, articulation of robotic instruments, greater precision with suture targeting, and elimination of surgeon tremor, robotic surgical systems innovatively perform more delicate and complex procedures involving extensive dissection and suturing techniques such as pancreaticoduodenectomy. Although associated with longer operative time, robotic pancreaticoduodenectomy (RPD) has been claimed to have the benefits of less delayed gastric emptying, less blood loss, shorter length of postoperative stay, and lower wound infection rate, as compared with the traditional open pancreaticoduodenectomy (OPD). Moreover, RPD seems to be not only technically feasible but also justified without compromising the survival outcomes for pancreatic head and ampullary adenocarcinomas. Therefore, RPD could be recommended not only to surgeons but also to patients in terms of surgical feasibility, surgical outcomes, and patient satisfaction.

The study of robotic pancreaticouodenectomy (RPD) focusing on delayed gastric emptying (DGE) is seldom reported. This study explored the incidence of DGE in RPD with extracorporeal hand-sewn gastrojejunostomy involving downward positioning of the stomach. Patients with periampullary lesions undergoing RPD or open pancreaticouodenectomy (OPD) were included for comparison. A variety of clinical factors were evaluated for the risk of developing DGE. There were 409 (68.2%) RPD and 191 (31.8%) OPD in this study. DGE occurred in 7.7% of patients after pancreaticoduodenectomy, with 4.4% in RPD and 14.7% in OPD, p < 0.001. Nausea/vomiting (12.6% vs. 6.3%) and jaundice (9.9% vs. 5.2%) were significant preoperative risk factors for DGE, while malignancy (8.7% vs. 2.2%) and lymph node involvement (9.8% vs. 5.6%) were significant pathological risk factors. Intraoperative blood loss > 200 c.c. was the other factor related to DGE (11.2% vs. 4.4% in those with blood loss ≤ 200 c.c.). None of the postoperative complications was significantly associated with DGE. Hospital stay was significantly longer in the group with DGE (median, 37 vs. 20 days in the group without DGE). After multivariate analysis by binary logistic regression, compared with OPD, RPD was the only independent factor associated with a lower incidence of DGE. RPD with extracorporeal hand-sewn antecolic, antiperistaltic, and inframesocolic gastrojejunostomy via a small umbilical wound involving careful downward positioning of the stomach was associated with a low incidence of DGE and presented as the most powerful independent predictor of this condition.