A location-based anatomic classification system for acute pancreatic fluid collections: Roadmap for optimal intervention in the step-up era

Walled-off pancreatic necrosis (WOPN) is a local complication of acute necrotizing pancreatitis frequently requiring intervention. Treatment is typically through the coordinated efforts of a multidisciplinary team. Current management guidelines recommend a step-up approach beginning with minimally invasive techniques (percutaneous or transmural endoscopic drainage) followed by escalation to more invasive procedures if needed. Although the step-up approach is an evidence-based treatment paradigm for management of pancreatic fluid collections, it lacks guidance regarding optimal invasive technique selection based on the anatomic characteristics of pancreatic fluid collections. Similarly, existing cross-sectional imaging-based classification systems of pancreatic fluid collections have been used to predict disease severity and prognosis; however, none of these systems are designed to guide intervention. We propose a novel classification system which incorporates anatomic characteristics of pancreatic fluid collections (location and presence of disconnected pancreatic duct) to guide intervention selection and clinical decision making. We believe adoption of this simple classification system will help streamline treatment algorithms and facilitate cross-study comparisons for pancreatic fluid collections.

Clinical outcomes of long-term transmural drainage with double pigtail stents in disconnected pancreatic duct syndrome

Background

Disconnected pancreatic duct syndrome (DPDS) is a common cause of recurrent pancreatic fluid collections (PFCs), often requiring repeat drainage. Following initial drainage with lumen apposing metal stents (LAMS), replacement with transmural double pigtail stents (DPS) has been shown to be a viable drainage modality mitigating the risk of recurrence. The sparsity of literature on the consequences of this strategy requires further investigation. We analyze our outcomes of long-term transmural drainage with DPS in patients with DPDS and assess the safety and efficacy of this technique.

Methods

This retrospective review of a prospectively maintained database from November 2015-May 2022 included all patients with DPDS who underwent removal of LAMS and replacement with long-term transmural DPS. Patient demographics, collection characteristics, drainage technique and outcomes, as well as follow-up data was collected and analyzed using descriptive statistics.

Results

There were 139 patients who underwent endoscopic drainage of PFCs with LAMS during the study period. Seventy-eight patients [walled-off necrosis (n=65) and pseudocysts (n=13)] were found to have DPDS. Of these, 44 patients underwent successful LAMS removal followed by replacement with DPS and were included in the analysis. The median age was 57 years and 14 (32%) were female. The median stent dwell time was 394 days [interquartile range (IQR) 245, 853 days]. Spontaneous stent migration was seen in seven patients (16%), one of whom developed a PFC recurrence which was managed conservatively. The second recurrence was seen in a patient with indwelling DPS which did not require further intervention. There were no locoregional adverse events secondary to long-term indwelling DPS. Among the 28 patients who were followed for a year, three patients developed new-onset diabetes, and chronic pancreatitis (CP) changes in the disconnected segment were seen in eight patients, five of whom required pancreatic enzyme supplementation.

Conclusions

Placement of long-term transmural DPS is an effective modality for preventing collection re-accumulation with a favorable safety profile. Randomized prospective studies are essential to investigate the optimal removal timing of indwelling stents to prevent loco-regional complications. Given the realized risk of CP in the disconnected pancreas, follow-up cross sectional imaging may help guide further therapy.

Endoscopic Ultrasound-Guided Gastro-gastrostomy Using Lumen Apposing Metal Stent for Management of High-Grade Gastric Outlet Obstruction Secondary to Vertical Banded Gastroplasty

Vertical banded gastroplasty (VBG) is associated with an increased risk of pouch stricture secondary to narrowing of the banded gastroplasty outlet. We describe a case of a 60-year-old male with stage 4 small cell lung cancer presenting with recurrent gastric outlet obstruction secondary to stenosis at the site of VBG. Given a prior history of failed standard endoscopic maneuvers including balloon dilation and steroid injection, the decision was made to create an endoscopic ultrasound-guided gastro-gastrostomy using lumen opposing metal stent. The patient did well post procedure and was able to tolerate a soft mechanical diet within 24 h. He was subsequently discharged to hospice for his advanced metastatic disease.