Castleman disease (CD) rarely presents with obstructive jaundice, which poses a diagnostic and therapeutic challenge to the management of the disease. A 40-year-old man was referred to our hospital for emergent management of upper abdominal pain. An abdominal mass was removed, and the postoperative pathology showed retroperitoneum CD, which was subsequently managed by adjuvant therapy of combination chemotherapy and steroids. One month later, a biliary metal stent was placed due to the presentation of obstructive jaundice. After approximately 3 months, the patient experienced another episode of obstructive jaundice, and SpyGlass DS cholangioscopy (Boston Scientific, Natick, Mass, USA) was performed via the biliary track for biopsy, which pathologically showed biliary malignancies. Radiofrequency ablation was performed with a probe (EMcision, Montreal, Canada), and another uncovered metal stent was placed within the existing metal stent. No stent occlusion occurred during a 6-month follow-up period. In conclusion, CD rarely presents with obstructive jaundice, and a combination of radiofrequency ablation with metal stent implantation under cholangioscopy can prolong the stent patency time and the survival time of patients.

SpyGlass peroral cholangioscopy (POCS) has greatly improved the diagnosis of biliary strictures by allowing direct visualization and tissue sampling in the bile ducts. Supported by strong registry data and careful analysis, POCS is highly accurate in diagnosis and carries minimal risks. It plays a pivotal role in diagnosis of indeterminate biliary stricture like primary sclerosing cholangitis (PSC), which increases the risk of cancer. POCS facilitates early disease detection through distinctive endoscopic observations and provides essential information with directed biopsies that assess inflammation and potential malignancy. This case study showcased POCS's diagnostic ability when it accurately identified benign findings in a 59-year-old patient with jaundice. Treatment with ursodeoxycholic acid resulted in significant improvements, highlighting the diagnostic performance of POCS. In summary, POCS simplifies complex biliary stricture cases, expedites diagnosis and intervention, and significantly contributes to improving patient outcomes in challenging hepatobiliary conditions.