Feasibility of nonradiation EUS-based ERCP in patients with uncomplicated choledocholithiasis (with video).

BACKGROUND AND AIMS: ERCP inherently involves radiation exposure. Nonradiation ERCP has been described in pregnancy. Theoretically, the same techniques could be applied to the general population. We prospectively assessed the feasibility of nonradiation, EUS-based ERCP in nonpregnant patients with choledocholithiasis. METHODS: Consecutive patients referred for ERCP for choledocholithiasis were recruited over a 1-year period. Patients providing study consent underwent the following procedural protocol. First, EUS was performed to verify the presence, size, and number of stones. Second, biliary cannulation was attempted without fluoroscopy for a maximum of 10 minutes. Selective cannulation was based on deep insertion with visible bile in the catheter on aspiration. Third, for stone removal, sphincterotomy was performed and stones were removed using a basket or balloon. The number of stones exiting the papilla was matched to the number seen on EUS. Finally, once the duct was deemed clear by the endoscopist, a final occlusion cholangiogram and ductal sweep served as the reference standard for confirmation of stone clearance. RESULTS: Nonradiation ERCP was attempted in 31 patients. Cannulation without fluoroscopy was successful in 26 patients (84%). Complete stone removal without fluoroscopy was achieved in all 26 of these cases. The 5 patients with failed nonfluoroscopic cannulation required double guidewire (n = 2) or precut papillotomy (n = 3) for deep biliary access and subsequent stone clearance. One patient who required precut papillotomy for access developed moderate post-ERCP pancreatitis (3%). CONCLUSIONS: Nonradiation, EUS-based ERCP for uncomplicated choledocholithiasis appears to be successful and safe. (Clinical trial registration number: NCT01678391.).

Underwater EMR of adenomas of the appendiceal orifice (with video).

BACKGROUND AND AIMS: EMR of adenomas involving the appendiceal orifice (AO) is controversial because of a high risk of perforation and incomplete resection. We evaluated the feasibility, safety, and outcomes of underwater EMR (UEMR) without submucosal injection for the treatment of adenomas involving the AO. METHODS: This was a prospective, observational study of a standardized UEMR technique without submucosal injection for adenomas involving the AO in 27 consecutive patients meeting inclusion and exclusion criteria. Surveillance colonoscopy included biopsy sampling of the EMR site and base of the AO. Main outcome measurements include technical success, histology, resection time, adverse events, and follow-up data. RESULTS: Over 42 months, UEMR of adenomas involving the AO (rim, 5 patients; inside, 22 patients) was attempted in 27 consecutive patients. Median adenoma size was 15 mm (range, 8 to 50). UEMR was successful in 24 patients (89%). Four patients were referred to surgery, 3 with UEMR failure because of an inability to exclude the adenoma extending into the appendix at the index procedure and 1 with invasive adenocarcinoma in the UEMR specimen. The median resection time was 3 minutes (range, 1 to 75). Adverse events consisted of postpolypectomy syndrome in 2 patients (7%). There was no perforation, bleeding requiring transfusion, or appendicitis. Final histology was tubular adenoma (7), tubulovillous adenoma (4), sessile serrated adenoma (15), and invasive adenocarcinoma (1). Twenty-one of 23 patients (91%), not referred to surgery, had follow-up colonoscopy with biopsy sampling of the resection site after a median of 29 weeks (range, 12 to 139) after resection. Residual adenoma was found in 2 of 21 patients (10%). CONCLUSION: On an intention-to-treat basis, UEMR without submucosal injection enabled safe and complete endoscopic resection of AO lesions. Close surveillance for residual or recurrence is warranted. ( CLINICAL TRIALS REGISTRATION NUMBER: NCT01750619.).

EUS-guided treatment of gastric fundal varices with combined injection of coils and cyanoacrylate glue: a large U.S. experience over 6 years (with video).

BACKGROUND AND AIMS: Conventional endoscopic treatment of gastric fundal varices (GFV) with cyanoacrylate (CYA) glue may be complicated by embolization and rebleeding. We evaluated the long-term outcomes of EUS-guided injection of coils and CYA glue for therapy of GFV. METHODS: A retrospective chart review of patients treated for GFV was performed. The main outcomes measured were hemostasis, obliteration on surveillance EUS, post-treatment bleeding rate, and adverse events. RESULTS: From March 2009 to 2015, 152 patients with GFV were treated. Seven (5%) had active hemorrhage, 105 (69%) had recent bleeding, and 40 (26%) were treated for primary prophylaxis. Treatment was technically successful in 151 patients (>99%). Mean number of coils was 1.4 (range, 1-4 coils), and mean volume of CYA was 2 mL (range, 0.5-6). Follow-up was available for 125 patients with treated GFV (mean, 436 days; range, 30-2043). Among 100 patients with follow-up EUS examinations, complete obliteration (on Doppler study) of GFV was confirmed in 93 (93%). Post-treatment bleeding from obliterated GFV occurred in 3 of 93 patients (3%). Twenty-five patients who had clinical and/or EGD follow-up had 3 post-treatment bleeding episodes after a median follow-up of 324 days (range, 41-486). Among the 40 patients treated for primary prophylaxis, 28 underwent follow-up EUS and 27 (96%) had confirmed obliteration. Mild postprocedure abdominal pain occurred in 4 of 125 patients (3%), and clinical signs of pulmonary embolization were seen in 1 patient (1%). Another 4 of 125 patients (3%) presented with minor delayed upper GI bleeding from coil/glue extrusion. CONCLUSIONS: EUS-guided combined coil and CYA glue injection of high-risk GFV appears to be highly effective for hemostasis in active bleeding and primary and secondary bleeding prophylaxis. Once obliteration was achieved, post-treatment bleeding from GFV occurred in only 3% during long-term follow-up. Combination therapy appears safe and may reduce the risk of CYA embolization.

Yield and performance characteristics of endoscopic ultrasound-guided fine needle aspiration for diagnosing upper GI tract stromal tumors.

BACKGROUND AND AIMS: EUS-FNA is a means of sampling suspected GI stromal tumors (GIST). However, there are limited published data on factors influencing the sampling yield, and on the performance characteristics of this technique in comparison with resection pathology. We analyzed the yield of EUS-FNA for submucosal lesions of the upper GI tract, and determined the performance characteristics of EUS-FNA for diagnosing GISTs. METHODS: We retrospectively reviewed procedural and pathology data from consecutive patients undergoing EUS-FNA of submucosal lesions from two medical centers over a 4-year period. We analyzed the yield of EUS-FNA, and calculated performance characteristics of EUS-FNA for GIST based on resection pathology. RESULTS: A total of 65 patients underwent EUS-FNA of 66 submucosal lesions during the study period. EUS-FNA was either diagnostic (68%) or suspicious (12%) in a total of 80%. EUS-FNA yielded the following diagnoses: GIST based on cytology and immunohistochemistry (56%), suspected GIST (12%), leiomyoma (9%), other neoplasm (3%), and non-diagnostic (20%). Larger lesion size, gastric location, and presence of on-site cytopathology were associated with higher yield in univariate analysis. Larger needle size and number of FNA passes were not associated with improved yield. Based on resection pathology from 28 specimens, the EUS-FNA performance characteristics for diagnosing GISTs included a sensitivity of 82%, a specificity of 100%, and an overall accuracy of 86%. CONCLUSIONS: EUS-FNA provides a high yield for sampling submucosal lesions and is highly accurate for diagnosing GISTs. EUS-FNA has an important role in the evaluation of suspected GISTs.

Management of hepatitis C-infected liver transplant recipients at large North American centres: changes in recent years.

Large (>or=45 transplants per year) North American liver transplant centres were surveyed regarding management of hepatitis C virus (HCV). A total of 25/41 (59%) and 28/48 (58%) of centres responded to the surveys in 1998 and 2003, respectively, with 17 centres participating in both surveys. HCV was the most common indication for transplantation. Use of protocol liver biopsies was higher in 2003 and 60% used them to monitor HCV disease. Fewer centres reported modifying primary immunosuppression (IMS) for HCV-positive (vs. non-HCV) patients in 2003 (26%) vs. 1998 (56%). IMS was most frequently tacrolimus-based, but mycophenolate mofetil use increased in 2003 (52% vs. 23% in 1998). In both years, approximately 40% treated allograft rejection differently in HCV-positive recipients, with less use of OKT3 in 2003. Combination anti-HCV therapy for 12 months or more was the treatment of choice and growth factor use was common (68%). HCV-positive recipients were considered candidates for retransplantation but HCV-specific criteria were used in decision-making. Practice of centres changed over time with an increase in HCV transplantation and use of protocol liver biopsies, and a trend towards lesser modification of IMS in HCV-positive recipients. We conclude that there is considerable variability in the management of HCV among transplant programs and over time.