Outcomes of robotic surgery for pancreatic ductal adenocarcinoma

Predicting Selection Preference of Robotic Pancreaticoduodenectomy (RPD) in a Chinese Single Center Population: Development and Assessment of a New Predictive Nomogram

BACKGROUND Robotic pancreaticoduodenectomy (RPD) is a novel type of minimally invasive surgery to treat tumors located at the head of the pancreas. This study aimed to construct a novel prediction model for predicting selection preference for RPD in a Chinese single medical center population. MATERIAL AND METHODS The clinical data from 451 pancreatic ductal adenocarcinoma patients were collected and analyzed from January 2013 to December 2016. Twenty-three items affecting clinical strategies were optimized by LASSO (least absolute shrinkage and selection operator) regression analysis and then were incorporated in multivariable logistic regression analysis. C-index was used for evaluating the discriminative ability. Decision curve was applied to determine clinical application of this model and the calibration of this nomogram was evaluated by calibration plot. The model was internally validated through bootstrapping validation. RESULTS Clinicopathological factors included in the model were age, history of diabetes mellitus, history of hypertension, history of heart, brain and kidney disease, history of abdominal surgery, symptoms (jaundice, accidental discovery and weight loss), anemia, elevated carcinoembryonic antigen (CEA), smoking, alcohol intake, American Society of Anesthesiologists (ASA) scores, vascular invasion, overweight, preoperative lymph node metastasis and tumor size >3.5 cm. A C-index of 0.831 indicated good discrimination and calibration of this model. Interval validation generated an acceptable C-index of 0.787. When surgical approach was determined at the threshold of preference possibility less than 63%, decision curve analysis indicated that this model had good clinical application value in this range. CONCLUSIONS This new nomogram could be conveniently used to predict the selection preference of robotic surgery for patients with pancreatic head cancer.

Long term oncological outcome of laparoscopic techniques in pancreatic cancer

The laparoscopic technique in distal pancreatic resection (LDP) has been widely accepted, and outcome data support the hypothesis that survival is improved, partly due to improved postoperative safety and recovery, thus optimizing treatment with adjuvant chemotherapy. But laparoscopic pancreaticoduodenectomy (LPD or Whipple-procedures) has spread more slowly, due to the complexity of the procedure. Surgical safety has been a problem in hospitals with low patient volume, resulting in raised postoperative mortality, requiring careful monitoring of outcome during the surgical learning curve. Robotic assistance is expected to improve surgical safety, but data on long term oncological outcome of laparoscopic Whipple procedures with or without robotic assistance is scarce. Future research should still focus surgical safety, but most importantly long term outcome, recorded as recurrence at maximal follow up or - at best - overall long term survival (OS). Available data show median survival above 2.5 years, five year OS more than 30% after LDP even in series with suboptimal adjuvant chemotherapy. Also after LPD, long term survival is reported equal to or longer than open resection. However, surgical safety during the learning curve of LPD is a problem, which hopefully can be facilitated by robotic assistance. Patient reported outcome should also be an endpoint in future trials, including patients with pancreatic ductal adenocarcinoma.

Distal pancreatectomy with splenorenal shunt to preserve spleen in a cirrhotic patient

At pancreatic ductal adenocarcinoma is an aggressive malignancy with a high recurrence rate. Due to its high potentials of local invasion and distant metastasis, surgical resection is the only means for possible long-term survival. Surgical treatment comprises a distal pancreatectomy with or without splenectomy. Surgery has been conventionally contraindicated for patients with cirrhosis and portal vein hepato-biliary hypertension. Splenorenal shunt was first described by Warren and colleagues, to prevent death from bleeding esophageal varices in a patient with a patent portal vein hypertension. A 55-year-old Caucasian woman presented with an incidental pancreatic tumor. In our case, the shunt was necessary to complete the corrective oncological surgery for pancreatic ductal adenocarcinoma. The main difficulty was the presence of portal hypertension due to liver cirrhosis Child A; moreover, preservation of the spleen was mandatory in this patient. We successfully performed a distal pancreatectomy without splenectomy through the help of splenorenal shunt to preserve venous circulation.

Staple-free robotic distal pancreatectomy and splenectomy

Minimally invasive surgery has slowly gained popularity in the field of hepatopancreatobiliary surgery in the last few years. This is likely due to shorter length of stay, less estimated blood loss and postoperative pain, quicker recovery, and better cosmetic results. The laparoscopic distal pancreatectomy is associated with less overall morbidity and considered as the standard of care for selected patients. Robotic distal pancreatectomy (RDP) not only maintains the benefits of the laparoscopic approach, but also adds potential benefits. In this article, we describe the operative technique of an entirely staple-free RDP with splenectomy. The method is presented in a stepwise approach along with a concise video. The patient presented is a 58-year-old male with a well-differentiated neuroendocrine tumor involving the body of the pancreas; no major blood vessel involvement.