-
Journal of Gastrointestinal Surgery :... May 2021Portal annular pancreas (PAP) is an anatomic variation due to aberrant fusion of the ventral and dorsal pancreatic buds around the portal vein. In this article, we... (Review)
Review
INTRODUCTION
Portal annular pancreas (PAP) is an anatomic variation due to aberrant fusion of the ventral and dorsal pancreatic buds around the portal vein. In this article, we present a case report with a systematic review of literature of patients undergoing major pancreatic surgery with associated PAP. We also intend to discuss and suggest possible surgical strategies to minimise major postoperative complications.
METHODS
A systematic literature search was conducted using the terms "circumportal," "periportal," "pancreas," "annular pancreas," "portal annular pancreas" and "pancreas anomaly." All articles describing portal annular pancreas with surgical resection were included.
RESULTS
We identified a total of 53 patients of PAP from 29 articles, who underwent pancreatic resection with a median age of 65 years. POPF (postoperative pancreatic fistula) was demonstrated in 42.55% of patients and 34% had CR (clinically relevant)-POPF. Following pancreaticoduodenectomy, pancreatic stump was reconstructed in all patients with either pancreaticojejunostomy or pancreaticogastrostomy. Standard line of pancreatic transection, i.e., division of anteportal portion at the pancreatic neck and stapling of the retroportal process, resulted in 71% incidence of CR-POPF, whereas it was only 16% when extended resection was performed to achieve single pancreatic stump and 12.5% when retroportal portion was sutured or ligated. Amongst distal pancreatic resections, 66% had POPF and 33% developed CR-POPF.
CONCLUSION
It is of utmost importance for pancreatic surgeons to diligently look for and identify PAP in the preoperative imaging. Additional imaging in the form of MRCP helps to define abnormal pancreatic ductal anatomy. Surgeons need to be cognisant of pancreatic stump management in patients with PAP to reduce associated higher rates of POPF.
Topics: Aged; Humans; Pancreas; Pancreatic Diseases; Pancreatic Fistula; Pancreaticoduodenectomy; Pancreaticojejunostomy; Postoperative Complications
PubMed: 33555524
DOI: 10.1007/s11605-021-04927-0 -
Pancreas Oct 2014Portal annular pancreas (PAP) is an asymptomatic congenital pancreas anomaly, in which portal and/or mesenteric veins are encased by pancreas tissue. The aim of the... (Review)
Review
Portal annular pancreas (PAP) is an asymptomatic congenital pancreas anomaly, in which portal and/or mesenteric veins are encased by pancreas tissue. The aim of the study was to determine the role of PAP in pancreatic surgery as well as its management and potential complication, specifically, postoperative pancreatic fistula (POPF).On the basis of a case report, the MEDLINE and ISI Web of Science databases were systematically reviewed up to September 2012. All articles describing a case of PAP were considered.In summary, 21 studies with 59 cases were included. The overall prevalence of PAP was 2.4% and the patients' mean (SD) age was 55.9 (16.2) years. The POPF rate in patients with PAP (12 pancreaticoduodenectomies and 3 distal pancreatectomies) was 46.7% (in accordance with the definition of the International Study Group of Pancreatic Surgery).Portal annular pancreas is a quite unattended pancreatic variant with high prevalence and therefore still remains a clinical challenge to avoid postoperative complications. To decrease the risk for POPF, attentive preoperative diagnostics should also focus on PAP. In pancreaticoduodenectomy, a shift of the resection plane to the pancreas tail should be considered; in extensive pancreatectomy, coverage of the pancreatic remnant by the falciform ligament could be a treatment option.
Topics: Adrenal Gland Neoplasms; Delayed Diagnosis; Disease Management; Female; Humans; Incidental Findings; Infant, Newborn; Male; Middle Aged; Pancreas; Pancreatectomy; Pancreatic Diseases; Pancreatic Fistula; Pancreaticoduodenectomy; Pancreaticojejunostomy; Postoperative Complications; Prevalence; Sex Distribution
PubMed: 25207658
DOI: 10.1097/MPA.0000000000000186