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Primary sclerosing cholangitis mimicking choledocal cyst type 1 in a young patient
1First Dept. of Medicine, Christian Albrechts University of Kiel, Germany.
Insights
Primary sclerosing cholangitis can mimic Type I choledochal cysts on ERCP imaging. This case highlights the importance of considering PSC in differential diagnoses for choledochal cyst patients.
Area of Science:
- Gastroenterology and Hepatology
- Diagnostic Imaging
- Interventional Endoscopy
Background:
- Choledochal cysts (CCs) are congenital biliary dilatations, with Type I being the most common.
- Standard treatment for CCs typically involves surgical excision.
- Endoscopic retrograde cholangiopancreatography (ERCP) is crucial for diagnosing and managing biliary tract disorders.
Observation:
- A 12-year-old boy initially diagnosed with Type I choledochal cyst underwent endoscopic balloon dilatation instead of surgery.
- Follow-up ERCP revealed cholangiographic findings consistent with primary sclerosing cholangitis (PSC).
- Liver biopsy confirmed the PSC diagnosis.
Findings:
- Endoscopic retrograde cholangiopancreatography (ERCP) findings in this patient mimicked Type I choledochal cyst.
- The patient developed primary sclerosing cholangitis (PSC) despite initial diagnosis and treatment for choledochal cyst.
- Percutaneous liver biopsy confirmed PSC, distinguishing it from the initial choledochal cyst diagnosis.
Implications:
- Primary sclerosing cholangitis (PSC) should be considered in the differential diagnosis of patients presenting with choledochal cyst-like features on ERCP.
- This case underscores the potential for overlapping imaging findings between choledochal cysts and PSC.
- Rethinking diagnostic interpretations in biliary imaging is crucial for accurate patient management.
Abstract:
A choledochal cyst type I was diagnosed in a 12-year-old boy in 1984. The diagnosis was made using ultrasound and confirmed using computed tomography (CT) and endoscopic retrograde cholangiopancreatography (ERCP). Instead of the usual surgical treatment, endoscopic balloon dilatation of the sphincter of Oddi and the distal common bile duct was carried out using an endoscopic procedure. The patient experienced relief of symptoms, gained weight and felt healthy again. An ERCP performed in 1990, because of increasing levels of liver enzymes and clinical features of abdominal pain and fatigue, revealed typical cholangiographic findings associated with primary sclerosing cholangitis, including bile duct irregularities with diffuse narrowing and twisting of the bile ducts with localized ectatic and strictured areas. Percutaneous needle liver biopsy confirmed the diagnosis. We conclude that primary sclerosing cholangitis should be considered when interpreting ERCP films from patients who are supposed to have choledochal cysts type I.