No placement-related complications were observed. The tract was dilated up to 4 mm or 6 mm in the cases with attempted drainage alone. The FCSEMSs were fully expanded in 8 cases (88.9%). A transnasal irrigation tube was placed through the FCEMS in 1 of the 5 cases with pancreatic pseudocyst and in 2 of the 4 cases with WOPN. The insertion of a therapeutic endoscope (9.9 mm in diameter) and DEN were achieved in all 3 cases where they were attempted. DEN was performed in 9 sessions in case 1, 3 sessions in case 4, and 4 sessions in case 7. In case 2 (WOPN), insertion of the nasal

tube and performance of the endoscopic procedure were impossible because the patient developed violent behavior due to delirium. Additional balloon dilation of the tract before see more each DEN was not required. U0126 datasheet No food

was found in the case with necrosectomy. We did not observe the inside of the cyst in the case without necrosectomy. Clinical success was achieved in 7 cases (77.8%). Of the 5 pancreatic pseudocyst cases, the pancreatic pseudocyst was successfully drained without DEN in all cases (100%). Complete remission of infection was achieved in 2 of the 4 cases (50.0%) with WOPN. In the other 2 cases, DEN could not be completed because of intracystic bleeding. Another patient required surgical treatment for splenic infarction and abscess 14 days after stent insertion. No early complications were observed. Late complications Methocarbamol were observed in 2 patients, including bleeding in 1. Patient 5 died from multiple

organ failure. Intraluminal bleeding disrupted drainage and DEN, necessitating transarterial embolization. The bleeding was caused by vessel damage because of inflammation, which was detected on autopsy. Spontaneous migration was observed in 1 patient (case 8), when the stent migrated outward and was passed out of the body without causing symptoms. The endoscopist noticed the migration just before attempting to remove the stent 26 days after insertion. Removal of the FCSEMS was achieved with no complications in all 6 cases in which it was attempted (100%), from 10 to 60 days after insertion. We evaluated a new FCSEMS for the treatment of PFC. The placement of multiple plastic stents to maintain a wide tract for drainage, irrigation, and DEN has gained mainstream acceptance but is associated with a high complication rate associated with migration, peritonitis, or bleeding. Multiple stenting requires additional time. When DEN is performed over several sessions, insertion and removal of multiple stents are necessary before and after each DEN, prolonging the procedures. In this regard, the FCSEMS may offer a better alternative. When a biliary or esophageal stent is used for PFC, the longer protrusion on both the stomach and cystic sides entails a risk of contact ulceration, bleeding, or migration. During DEN, such stents interfere with the operation of the endoscope.