1. Eum JS, Kim GH, Park CH, et al. A remnant cystic duct cancer presenting as a duodenal submucosal tumor. Gastrointest Endosc. 2008; 67:975–976.
2. Han SY, Chon HK, Kim SH, et al. Quality indicators of endoscopic ultrasound in the pancreatobiliary system: a brief review of current guidelines. Clin Endosc. 2024; 57:158–163.
3. Ryou SH, Kim HJ. Successful removal of remnant cystic duct stump stone using single-operator cholangioscopy-guided electrohydraulic lithotripsy: two case reports. Clin Endosc. 2023; 56:375–380.