The goal of this prospective, single-center observational study is to evaluate the safety and effectiveness of the HANAROSTEN® HOT Plumber™ with Z-EUSIT™ for draining pancreatic pseudocysts. The main questions the study aims to answer are: * Does the device reduce the size of pancreatic pseudocysts by at least 50% and improve associated symptoms within 30 to 60 days? * Can the stent be successfully placed, retained, and removed without complications? Participants will: * Undergo endoscopic ultrasound-guided transgastric or transduodenal drainage of pancreatic pseudocysts using the HANAROSTEN® HOT Plumber™ with Z-EUSIT™. * Be monitored for adverse events such as bleeding, infection, stent migration, or tissue injury. * Return for follow-up visits within 30 or 60 days for stent removal and evaluation of clinical success. The study will: * Enroll 20 adults aged 18 years or older who meet the inclusion criteria. * Conduct follow-up assessments until one month after stent removal.