Faculty Bibliography

BACKGROUND:Early detection of pancreatic ductal adenocarcinoma (PDAC) is an important goal for improving survival. Individuals who meet published guidelines for surveillance may be underidentified, and family communication about risk represents a pathway to increasing participation in surveillance. We investigated the uptake of and barriers to surveillance in at-risk relatives of clinic patients. METHODS:We conducted a retrospective record review of patients with personal or family history of PDAC evaluated over 12 months. The first relative presenting to clinic (proband) reported surveillance status and reasons for nonparticipation for at-risk relatives. Descriptive analyses and Fisher's exact tests were conducted to evaluate differences in surveillance participation. RESULTS:Among 193 at-risk relatives, 21% were in surveillance. The primary reasons for nonparticipation were lack of awareness (36%) and lack of interest (24%). Neither the sex nor the cancer status of probands impacted surveillance. At-risk relatives with familial pancreatic cancer (FPC) who also carried relevant pathogenic germline variants (PGVs) were more likely to undergo surveillance than those with FPC or PGVs alone (P = .003). Among families with PGVs, 59% of relatives potentially eligible for surveillance had not completed genetic testing. CONCLUSION/CONCLUSIONS:PDAC surveillance is underutilized in high-risk families. Communication interventions to address informational needs and decisional support could improve outcomes.

The COVID-19 pandemic is seemingly peaking now in New York City and has triggered significant changes to the standard management of gastrointestinal diseases. Priorities such as minimizing viral transmission, preserving (personal protective equipment) PPE, and freeing hospital beds have driven unconventional approaches to managing GI patients. Conversion of endoscopy units to COVID units and redeployment of gastroenterology (GI) fellows and faculty has profoundly changed the profile of most GI services. Meanwhile, consult and procedural volumes have been drastically reduced. In this review we share our collective experiences, how we have changed our practice of medicine, in response to the COVID surge. While we will review our management of specific consults and conditions, the overarching theme focuses primarily on non-invasive measures and maximizing medical therapies. Endoscopic procedures have been reserved for those timely interventions that are most likely to be therapeutic. The role of multidisciplinary discussion, while always important, has now become critical. And the support of our faculty and trainees remains essential. Local leadership can encourage well-being by frequent team check-ins and foster trainee development through remote learning. Advancing a clear vision and a transparent process for how to organize and triage care in the recovery phase will allow for a smooth transition to our "new normal."

Introduction: Pancreatic cystic lesions (PCL) are increasingly identified on cross-sectional imaging. Types include intraductal papillary mucinous neoplasms (IPMN), mucinous cystic neoplasms (MCN), serous cystadenoma (SCA), solid pseudopapillary tumors (SPT) and pseudocysts. Given the risk of malignancy associated with MCN and IPMN with high risk features, accurate PCL diagnosis is essential. Endoscopic ultrasound (EUS) with fine needle aspiration (FNA) of cyst fluid for cytology remains important for the classification of PCL, but is limited by the ability to obtain a sufficient sample and cellularity of fluid. The specificity for malignant cytology is 94%, but sensitivity remains low at 51%. Recently, introduction of a novel microforceps biopsy (MFB) device (Moray Micro Forceps, US Endoscopy, Mentor, OH) has enabled EUS-guided through-the-needle biopsies of PCL through a 19-gauge needle. The aim of this study is to compare the technical success and diagnostic yield for PCL using MFB versus cyst fluid studies alone, along with identifying adverse events associated with MFB.
Method(s): We conducted a retrospective chart review of adult patients with PCL diagnosed by cross sectional imaging undergoing EUS-guided FNA with MFB at 2 tertiary academic centers from November 2016 to November 2019. FNA of PCL was performed and cyst fluid was sent for cytology, carcinoembryonic antigen (CEA) levels, and mutational analysis. Cyst biopsy was performed using MFB.
Result(s): 14 patients were included. 71% were female. Median age was 60 years. Location of cysts in pancreas were head (4), body (6), and tail (4). MFB was technically successful in 12 of 14 cases (yield 86%) including 1 case where no cyst fluid was able to be obtained. There were no reported adverse outcomes (bleeding, pancreatitis, perforation, infection, abdominal pain). MFB diagnosed IPMN in 2 patients, neither of which were identified by cytology but were identified by fluid mutational analysis; MCN in 2 patients, 1 of which was identified by cytology; and SCA in 1 patient where cytology was concerning for a mucinous lesion. Both MFB and cytology were concerning for pseudocyst in 1 patient who ultimately was found to have MCN.
Discussion(s): The technical success of MFB is high and is associated with increased overall diagnostic yield without significant adverse events. For distinguishing PCL types, MFB provided additive diagnostic information to fluid cytology in 4 of 14 patients in our study. Including mutational analysis which identified IPMN in 2 patients where cytology was negative, MFB still provided further diagnostic information in 2 additional patients. This study suggests that the addition of MFB to EUS-guided sampling for cytology, CEA and mutational analysis further augments PCL diagnosis. Future studies should elucidate the role of MFB in combination with mutational analysis. [Formula presented]
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Background: Endoscopic Ultrasound guided biliary drainage (EUS-BD) has been demonstrated as a safe and effective alternative to Endoscopic Retrograde Cholangiopancreatography (ERCP) in malignant biliary obstruction. Various plastic and metal stents have previously been used for drainage, with recently increasing use of lumen apposing metal stents (LAMS). However there is limited data to guide patient selection, choice of stent, or method of placement. This study examines the rates of technical success, clinical success, and adverse events associated with the use of LAMS for EUS-BD.
Method(s): A retrospective study was conducted at 10 institutions. It included all cases of biliary obstruction that EUS-BD was performed using a LAMS. Collected data points were clinical and technical factors, adverse events and mortality. Main outcomes were technical success (defined as successful LAMS placement), clinical success (50% decline in bilirubin at 2 weeks), recurrence of biliary obstruction, and adverse events.
Result(s): 72 patients were included with median follow up of 56 days. Descriptive data is in Table 1 and Table 2. Most obstructions (89%) were at the distal common bile duct and the main etiology was pancreatic cancer (82%). Mean pre-procedure bilirubin was 19.2 mg/dl and common bile duct size was 22.7 mm. ERCP was attempted initially in 47% of patients. In patients where technical success (97%) was achieved, 100% clinical resolution was noted. Median time to clinical success was 1 day. Biliary obstruction recurred in 6% of cases, though no predicting factors were identified. A total of 9 (12.5%) (6 mild, 1 moderate, 2 severe) non-LAMS related adverse events were reported. There were 11 (15%) LAMS associated adverse events (6 food impaction, 4 bleeding, 1 migration). Elective LAMS removal without fistula closure was performed in 3 cases and was not associated with recurrent biliary obstruction or adverse events. 17% of patients died during follow up but no deaths were attributed to the procedure.
Conclusion(s): EUS-BD with LAMS is effective in relieving malignant biliary obstruction with low rates of recurrence. There was high technical success with this procedure and this resulted in clinical resolution in all successful cases. No other clinical or technical factors were associated with initial technical or clinical success, recurrent biliary obstruction or adverse events. Further prospective studies are needed to validate these findings and generate longer term data. [Formula presented] [Formula presented]
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Background: Lumen-apposing self-expandable metal stents (LAMS) have transformed the management of pancreatic fluid collections over the last two decades. There has since been significant interest in expanding the utility of LAMS for additional therapies such as the management of benign luminal strictures. However, there remains little data on their efficacy and safety when used for this indication. The goal of this study was to define the technical success, clinical success, and complication rates of LAMS when used in the management of benign strictures Methods: This was a retrospective multicenter evaluation of the safety, efficacy, and long-term clinical durability of LAMS in the treatment of benign strictures. The study took place between June 2018 and November 2019. Data collection included demographic information, indication, stent size, use of concurrent balloon dilation including dilation diameter, stent stabilization technique, intra-procedure and post-procedure complications, clinical improvement, and post-procedure follow up outcomes.
Result(s): 30 patients underwent placement of LAMS for a benign luminal stricture, with one having two stents placed during the index procedure at separate areas of stenoses resulting in a total of 31 stents placed. In total, 19 stents were 15 x 10 mm and 12 stents were 20 x 10 mm. No intra-procedural complications were noted. The technical success of deployment was 100%. Clinical resolution of symptoms was present in 25 (83%) patients. Of the patients who experienced clinical improvement, 17 underwent stent removal after an average of 6.4 weeks, and clinical recurrence occurred in 7 (41%) patients. The mean time to recurrence of symptoms after stent removal was 7 weeks. Univariate subgroup analysis revealed 15 x 10 mm stents were associated with clinical improvement (OR 12.86, 95% CI: 1.27-130.57, p 0.031). Each patient who did not clinically improve developed pain (3) or stent migration (2). In total 11 (37%) patients developed minor post-procedure adverse event. Stent migration was seen in 5 (17%) cases. Bleeding and pain were noted in 1 (3%) and 7 (23%) patients, respectively. Ulceration was found in 4 patients.
Conclusion(s): LAMS is a durable, safe option for patients with benign luminal strictures. Overall technical success was 100% and clinical success was 83%. The data also suggests better clinical outcomes with 15 x 10 mm stents, when compared to 20 x 10 mm stents. Pain is the most common adverse event but easily managed. [Formula presented]
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Background/Aims/UNASSIGNED:The management of small, incidentally discovered nonfunctioning pancreatic neuroendocrine tumors (NF-PNETs) has been a matter of debate. Endoscopic ultrasound with fine-needle aspiration (EUS-FNA) is a tool used to identify and risk-stratify PNETs. This study investigates the concordance rate of Ki67 grading between EUS-FNA and surgical pathology specimens in NFPNETs and whether certain NF-PNET characteristics are associated with disease recurrence and disease-related death. Methods/UNASSIGNED:: We retrospectively reviewed the clinical history, imaging, endoscopic findings, and pathology records of 37 cases of NFPNETs that underwent pre-operative EUS-FNA and surgical resection at a single academic medical center. Results/UNASSIGNED:: There was 73% concordance between Ki67 obtained from EUS-FNA cytology and surgical pathology specimens; concordance was the highest for low- and high-grade NF-PNETs. High-grade Ki67 NF-PNETs based on cytology (p=0.028) and histology (p=0.028) were associated with disease recurrence and disease-related death. Additionally, tumors with high-grade mitotic rate (p=0.005), tumor size >22.5 mm (p=0.104), and lymphovascular invasion (p=0.103) were more likely to have poor prognosis. Conclusions/UNASSIGNED:: NF-PNETs with high-grade Ki67 on EUS-FNA have poor prognosis despite surgical resection. NF-PNETs with intermediate-grade Ki67 on EUS-FNA should be strongly considered for surgical resection. NF-PNETs with low-grade Ki67 on EUSFNA can be monitored without surgical intervention, up to tumor size 20 mm.

Familial adenomatous polyposis (FAP) is an autosomal dominant syndrome associated with mutation in the adenomatous polyposis coli (APC) gene, a tumour suppressor located on chromosome 5q21. Attenuated familial adenomatous polyposis (AFAP) is a variant associated with fewer and later onset of colon polyps. AFAP-associated APC mutations have largely been found before codon 157, in exon 9 or after codon 1595. We present the case of a 44-year-old man incidentally found to have numerous gastric polyps during bariatric surgery, with innumerable polyps in the remaining part of the stomach and the entire colon, with rectal sparing, consistent with AFAP phenotype. Genetic testing demonstrated the c.7682dup (p.Ser2562Lysfs*21) variant in exon 15 of APC. This represents a previously undescribed APC mutation. This mutation likely yields end-binding protein 1 and human disc large binding protein inactivation, causing cell cycle microtubule dysregulation and tumour suppressor inactivation. Through loss of these regulatory mechanisms, this mutation is associated with AFAP phenotype. The patient was treated surgically and is doing well.